ARLINGTON -- High-A Myrtle Beach pitcher Matt West, ranked by MLB.com as the Rangers' 15th best prospect, had Tommy John surgery on Wednesday and will miss the remainder of the season. The right-hander went 0-3 with a 6.64 ERA in 17 appearances this season, striking out 14 and walking 16 in 20 1/3 innings. He was drafted by the Rangers in the second round in 2007 as a shortstop before being converted to a pitcher last spring. West suffered a sprained ulnar collateral ligament in March but returned midseason for Myrtle Beach. West, 23, was moved to the Rangers 40-man roster last November and was optioned to Myrtle Beach on March 13. He batted .241 with 22 homers and 150 RBIs in 370 Minor League games while posting a 4.51 ERA in 46 appearances. West remains on the Rangers' 40-man roster, which currently has 39 players.