ST. LOUIS -- Cardinals pitching prospect Tyrell Jenkins underwent season-ending surgery on Monday to repair the latissimus muscle in his right shoulder. The expected recovery time for the 21-year-old right-hander is six to eight months.
Jenkins, ranked by MLB.com as the organization's seventh-best prospect, had been dealing with shoulder issues for much of the season. He exited his June 7 start with low Class A Peoria due to what was later diagnosed as a shoulder strain. He returned to the mound later that month, made two starts and then left a third after facing one batter.
In total, Jenkins made 13 starts for Peoria and high Class A Palm Beach this season. He finishes with a 4.70 ERA, 25 walks and 40 strikeouts in 59 1/3 innings.
A first-round pick in the 2010 First-Year Player Draft, Jenkins has not thrown more than 83 innings in any of his first three full seasons in the Minors.
Jenifer Langosch is a reporter for MLB.com. Read her blog, By Gosh, It's Langosch, and follow her on Twitter @LangoschMLB. This story was not subject to the approval of Major League Baseball or its clubs.