Martijn Keltner (@SwimCoach76) header
Martijn Keltner (@SwimCoach76) profile picture

Martijn Keltner

@SwimCoach76

Belton High AP Physics/Biology/Zoology teacher and Swim Coach

Joined August 2012
  • Tweets3.2K
  • Following234
  • Followers376
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Photo by Martijn Keltner (@SwimCoach76)Photo by Martijn Keltner (@SwimCoach76)Photo by Martijn Keltner (@SwimCoach76)Photo by Martijn Keltner (@SwimCoach76)Photo by Martijn Keltner (@SwimCoach76)Photo by Martijn Keltner (@SwimCoach76)Photo by Martijn Keltner (@SwimCoach76)Photo by Martijn Keltner (@SwimCoach76)Photo by Martijn Keltner (@SwimCoach76)Photo by Martijn Keltner (@SwimCoach76)
Martijn Keltner retweeted
TickPick (@TickPick) profile picture
TickPick
@TickPickJul 28
🚨 NEWS: Our biggest (and best) app update is live! Here are a few things you can expect: ▫️More Powerful Price Tracker ▫️Redesigned Home Screen ▫️Improved Seating Chart Let's break it down ⤵️
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Kansas City Chiefs (@Chiefs) profile picture
Kansas City Chiefs
@ChiefsApr 26
Chiefs Kingdom, who wants a signed jersey from our newest cornerback?!? RT for a chance to win‼️
Image from Kansas City Chiefs (@Chiefs)
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Martijn Keltner retweeted
MLB (@MLB) profile picture
MLB
@MLBApr 7
Collecting baseball cards has always been one of the best hobbies to get kids into baseball! Repost and comment for your chance to win this 2026 @Topps Series 1 box to open with your kids ❤️
Two 2026 Topps Series 1 Hobby Boxes

ALT Two 2026 Topps Series 1 Hobby Boxes

MLB (@MLB) profile pictureMLB
@MLBApr 7
JUST IN: “MLB Clubhouse” is here and ready to engage the next generation of young fans! ❤️ MLB will now have a new YouTube channel for kids with youth-focused content to bring kids closer to the game than ever before. The MLB Clubhouse lineup will feature weekly shows called “The Doug Out!,” “MLB Art Club,” “No Easy Outs,” and “Let’s Play Ball” along with weekly highlights and compilations for kids!
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Martijn Keltner retweeted
MLB (@MLB) profile picture
MLB
@MLBMar 16
We’re celebrating Vladimir Guerrero Jr.'s birthday with a giveaway 🥳 Repost and reply for a chance to win this autographed Bowman’s Best card!
2024 Bowman’s Best Autographed card Vladimir Guerrero Jr, Toronto Blue Jays (22/50)

ALT 2024 Bowman’s Best Autographed card Vladimir Guerrero Jr, Toronto Blue Jays (22/50)

MLB (@MLB) profile pictureMLB
@MLBMar 16
Vladdy Jr. appreciation post! Happy 27th birthday to the @BlueJays superstar ⭐️
Vladimir Guerrero Jr. smiles while running on the field. He wears a white Toronto Blue Jays uniform with blue lettering and a blue and white Toronto Blue Jays cap.

ALT Vladimir Guerrero Jr. smiles while running on the field. He wears a white Toronto Blue Jays uniform with blue lettering and a blue and white Toronto Blue Jays cap.

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Martijn Keltner retweeted
MLB (@MLB) profile picture
MLB
@MLBJan 2
El Niño's birthday calls for an epic giveaway 🥳 Repost and reply for your chance to win this @Topps Luminaries card!
2023 Topps Luminaries Home Run Kings Autographed Card Fernando Tatis Jr., San Diego Padres (06/15) MLB 1st Half HR Record for SS (2021)

ALT 2023 Topps Luminaries Home Run Kings Autographed Card Fernando Tatis Jr., San Diego Padres (06/15) MLB 1st Half HR Record for SS (2021)

MLB (@MLB) profile pictureMLB
@MLBJan 2
Pic that goes hard ⚾🥶 Wishing a happy 27th birthday to the electric Fernando Tatis Jr. ⭐️
Fernando Tatis Jr. is coming in from right field while it’s raining at Yankee Stadium. He is wearing a tan pinstripe Padres uniform.

ALT Fernando Tatis Jr. is coming in from right field while it’s raining at Yankee Stadium. He is wearing a tan pinstripe Padres uniform.

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Kansas City Chiefs (@Chiefs) profile picture
Kansas City Chiefs
@ChiefsJan 2
NEW NEWS!!!! RT to win a @newheightshow hat signed by @tkelce and to help him win the #WPMOYChallenge
Image from Kansas City Chiefs (@Chiefs)
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Martijn Keltner retweeted
MLB (@MLB) profile picture
MLB
@MLBJan 1
No tricks here, we have a true 1-of-1: Joey Votto! 😆 Repost and reply for a chance to win our final @Topps #1of1Day giveaway!
2022 Topps Triple Threads Jumbo Relic Card Joey Votto, Cincinnati Reds, (1/1)

ALT 2022 Topps Triple Threads Jumbo Relic Card Joey Votto, Cincinnati Reds, (1/1)

MLB (@MLB) profile pictureMLB
@MLBJan 1
Joey Votto’s personality is unmatched Never forget when he faked out Phillies fans into thinking they were getting a foul ball 🤣
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Martijn Keltner retweeted
MLB (@MLB) profile picture
MLB
@MLB26 Dec 2025
A celebration about Ozzie Repost and reply for a chance to win this autographed Ozzie Smith @Topps card!
2017 Topps Tribute Certified Autograph issue Ozzie Smith, St. Louis Cardinals “The Wizard” Wields his Magic Wand October 14, 1985 (32/50)

ALT 2017 Topps Tribute Certified Autograph issue Ozzie Smith, St. Louis Cardinals “The Wizard” Wields his Magic Wand October 14, 1985 (32/50)

MLB (@MLB) profile pictureMLB
@MLB26 Dec 2025
“GO CRAZY, FOLKS, GO CRAZY!” Happy birthday to Hall of Famer, 15x All-Star, 13x Gold Glove Award winner, a Wizard of Oz you CAN rely on - the legendary Ozzie Smith.
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Martijn Keltner retweeted
USA Swimming (@USASwimming) profile picture
USA Swimming@USASwimming25 Dec 2025
Elevate your swimming in 2026 🔥 RT for a chance to win this Speedo Fastskin HyperSpark suit! 2025 #HolidayGiveaway rules » bit.ly/4p3DVPL
Image from USA Swimming (@USASwimming)
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Martijn Keltner retweeted
USA Swimming (@USASwimming) profile picture
USA Swimming@USASwimming24 Dec 2025
The perfect present for swimmers this holiday season! 🎁 RT for a chance to win this @SWIMOUTLET holiday box. 2025 #HolidayGiveaway rules » bit.ly/4p3DVPL
Image from USA Swimming (@USASwimming)
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Martijn Keltner retweeted
USA Swimming (@USASwimming) profile picture
USA Swimming@USASwimming23 Dec 2025
A good gift to represent a good cause! RT to win a @SwimFoundation swag bundle. 2025 #HolidayGiveaway rules » bit.ly/4p3DVPL
Image from USA Swimming (@USASwimming)
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Martijn Keltner retweeted
MLB (@MLB) profile picture
MLB
@MLB1 Dec 2025
A natural entertainer on the diamond 🎩💫 Repost and reply for a chance to win this Javy Báez @Topps relic card!
2022 Topps Triple Threads Relic Card Javier Báez, Detroit Tigers (13/27)

ALT 2022 Topps Triple Threads Relic Card Javier Báez, Detroit Tigers (13/27)

MLB (@MLB) profile pictureMLB
@MLB1 Dec 2025
Happy 33rd birthday to Javier Báez! El Mago was fun to watch in 2025 ✨
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Martijn Keltner retweeted
Kansas City Chiefs (@Chiefs) profile picture
Kansas City Chiefs
@Chiefs30 Nov 2025
We're giving away a signed @TeamJuJu helmet thanks to @StorageMart 👏 RT this post and you're entered to win!
Image from Kansas City Chiefs (@Chiefs)
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After the semifinal round of State diving freshman Jax Coble sits in 16th place and has qualified for the finals!!
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After the preliminary round of State diving Freshman Jax Coble sits at 18th place and has qualified for the semifinal round! Junior Braeden Hill finishes 24th!
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Giving away 7 tickets to Sunday Night game retweet for a chance to win‼️
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Martijn Keltner retweeted
Arrowhead Live (@ArrowheadLive) profile picture
Arrowhead Live
@ArrowheadLive16 Sep 2025
🚨GIVEAWAY🚨 How about another? We are giving away this @RoyalsJalen rookie on-card auto to a lucky fan✍️ All you need to do to enter: 1️⃣RETWEET 2️⃣FOLLOW @ArrowheadLive ⏳Giveaway ends at the conclusion of Jalen’s NFL Debut⏳ #Chiefs | #ChiefsKingdom
Image from Arrowhead Live (@ArrowheadLive)
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Martijn Keltner retweeted
Arrowhead Live (@ArrowheadLive) profile picture
Arrowhead Live
@ArrowheadLive18 Aug 2025
🚨SEASON KICKOFF GIVEAWAY🚨 Let’s start the season right by giving away a 2022 & 2025 Red Friday Flag and a @RoyalsJalen rookie auto card to a lucky fan✍️ All you need to do to enter: 1️⃣RETWEET 2️⃣FOLLOW @ArrowheadLive ⏳Giveaway ends 9/5 @ 10pm CST⏳ #Chiefs | #ChiefsKingdom
Image from Arrowhead Live (@ArrowheadLive)
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Martijn Keltner retweeted
MLB (@MLB) profile picture
MLB
@MLB7 Aug 2025
Today is Mike Trout’s birthday! 🐟 To celebrate, we’re giving away a 2019 @Topps Tribute Stamp of Approval Relic Card. Repost and reply for your chance to win!
2019 Topps Tribute Stamp of Approval Relic Card Authentic Game-Used Memorabilia Mike Trout, Los Angeles Angels (06/50)

ALT 2019 Topps Tribute Stamp of Approval Relic Card Authentic Game-Used Memorabilia Mike Trout, Los Angeles Angels (06/50)

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Martijn Keltner retweeted
MLB (@MLB) profile picture
MLB
@MLB3 Jul 2025
CK3K!!! In honor of Clayton Kershaw's incredible accomplishment, we're giving away a sweet set of @Topps Kersh cards! Repost and reply for a chance to win.
2017 Topps Tribute Clayton Kershaw, Los Angeles Dodgers (06/10) Topps Inception Clayton Kershaw, Los Angeles Dodgers (118/150) 2017 Topps Diamond Icons Game-used memorabilia Clayton Kershaw, Los Angeles Dodgers (2/10)

ALT 2017 Topps Tribute Clayton Kershaw, Los Angeles Dodgers (06/10) Topps Inception Clayton Kershaw, Los Angeles Dodgers (118/150) 2017 Topps Diamond Icons Game-used memorabilia Clayton Kershaw, Los Angeles Dodgers (2/10)

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