MINNEAPOLIS -- Twins Minor Leaguer right-handers Kyle Gibson and Anthony Slama saw team orthopedists, Dr. Dan Buss and Dr. John Steubs, because of right elbow soreness on Monday, and will require further testing on Tuesday.
"Both players will undergo further diagnostic testing tomorrow and we will provide an update during tomorrow night's game," Twins general manager Bill Smith said in a statement.
Gibson was originally placed on the Minor League disabled list with soreness in the flexor muscle area near his elbow and underwent an MRI on Wednesday. The 6-foot-5 right-hander is the 33rd-ranked prospect in baseball and No. 2 in the Twins' system, according to MLB.com.
The 23-year-old could need Tommy John surgery, as Twins Minor League director Jim Rantz said last week the club was worried it could be a torn ulnar collateral ligament.
Gibson, the club's first-round pick in the 2009 First-Year Player Draft, had been struggling recently, as he went 0-5 with a 6.47 ERA in eight starts over June and July. It came after he entered June with a 3.60 ERA and 59 strikeouts in 55 innings.
Slama, meanwhile, was placed on the Minor League disabled list on July
6 because of elbow soreness. The reliever posted a 2.92 ERA with 42 strikeouts in 37 innings with Triple-A Rochester before his injury.
The 26-year-old also tossed 2 1/3 scoreless innings with the Twins this year in a brief stint with the club from late May into early June.