Mariners prospect Ji-Man Choi suspended 50 games for performance-enhancing drug

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Ji-Man Choi, a Triple-A first baseman in the Mariners’ farm system, has been suspended 50 games after testing positive for the performance-enhancing drug methandienone.

Most minor leaguers who get 50-game suspensions are non-prospects, but Choi got off to a great start at Triple-A this season as a 23-year-old and has put up huge career numbers. He’s definitely a solid prospect with some long-term upside.

Last season he hit .295 with 18 homers and a .929 OPS in 122 games split among three different levels and for his career Choi is a .312 hitter with a .414 on-base percentage and .512 slugging percentage.

Dodgers tab Walker Buehler to start on Monday

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The Dodgers announced that pitching prospect Walker Buehler will be called up to start on Monday against the Marlins. Rich Hill went on the 10-day disabled list with a cracked fingernail, so Buehler will serve as a fill-in while the lefty is out, likely for just one start.

Buehler, a 23-year-old right-hander, made his major league debut last September, making eight relief appearances. He struggled, yielding eight runs on 11 hits and eight walks with 12 strikeouts in 9 1/3 innings. He was off to a good start to his 2018 season at Triple-A Oklahoma City, owning a 2.08 ERA with 16 strikeouts and four walks in 13 innings.

Monday will be Buehler’s first major league start. He is the Dodgers’ No. 1 prospect and No. 12 overall in baseball according to MLB Pipeline.