Antonio Bastardo, Jordany Valdespin and Sergio Escalona among 13 suspended MLB players

Philadelphia Phillies pitcher Antonio Bastardo, New York Mets utilityman Jordany Valdespin and Houston Astros minor leaguer Sergio Escalona will be suspended by Major League Baseball on Monday for their involvement with the Biogenesis wellness clinic, sources told Yahoo! Sports.

The three are among the heretofore-unreleased names of players who have agreed to suspensions with the league after documents and testimony from Biogenesis owner Anthony Bosch linked them to performance-enhancing drug use.

Each will receive a penalty of 50 games. Players who the league believe lied during interviews pertaining to Biogenesis could receive additional discipline. The league will announce the suspensions for them, along with around 10 other players, including a ban through 2014 for New York Yankees star Alex Rodriguez, on Monday afternoon.

Bastardo, 27, is one of the top left-handed relief pitchers in the National League and has a 2.32 ERA through 42 2/3 innings this season. He has been the lone consistent pitcher in the worst bullpen in the National League. The Phillies' bullpen ERA entering Sunday's game was 4.35.

[Related: Ex-Phillies pitcher lashes out at Antonio Bastardo on Twitter]

Valdespin, 25, was recently demoted to the Mets' Triple-A affiliate, Las Vegas, where he is serving a three-game suspension for inciting a benches-clearing brawl after showboating a home run. Valdespin cursed out Mets manager Terry Collins after the team refused to put him on the disabled list July 15 instead of sending him to the minor leagues. He is hitting .463/.540/.778 at Triple-A after failing to crack a .200 batting average with the Mets this year.

Escalona, 29, spent parts of two seasons in the major leagues and is at Double-A Corpus Christi. He underwent Tommy John surgery during spring training in 2012 and returned this year. In 12 appearances at Double-A, he has a 6.60 ERA and has allowed 31 baserunners in 15 innings.

Other players receiving 50-game suspensions for their involvement with Biogenesis are Texas Rangers outfielder Nelson Cruz, Detroit Tigers shortstop Jhonny Peralta, San Diego Padres shortstop Everth Cabrera, Yankees catcher Francisco Cervelli, minor leaguers Jesus Montero, Cesar Puello and Fernando Martinez, and free agents Jordan Norberto and Fautino de los Santos. Milwaukee Brewers star Ryan Braun already accepted a 65-game suspension.

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