Mariners right-hander Taijuan Walker had to be scratched from what was supposed to be his final minor league rehab start Tuesday at Triple-A Tacoma and he headed to Seattle on Wednesday for tests.
The MRI results are in, according to Bob Dutton of the Tacoma News Tribune, and Walker has been diagnosed with a right shoulder impingement. He will be shut down from throwing for two weeks, and can now probably be ruled out through at least mid-May.
Walker was supposed to open the 2014 season as a member of Seattle’s starting rotation, but he battled shoulder problems all spring and landed on the 15-day disabled list before Opening Day.
The 21-year-old top pitching prospect registered an impressive 2.93 ERA, 1.196 WHIP, and 10.2 K/9 in 141 1/3 innings last season between the Double-A and Triple-A levels. He then made his MLB debut August 30.
Pirates right-hander Joe Musgrove is done for the year after suffering an abdominal wall muscle strain and stress reaction in his pelvic bone. While he isn’t expected to undergo surgery or miss additional time in 2019, he’s been prescribed six weeks of rest before resuming any baseball-related activities.
Musgrove, 25, finished out his third year in Pittsburgh with a 6-9 record in 19 starts, backed by a 4.06 ERA, 1.8 BB/9, and 7.8 SO/9. Despite logging a career-high 115 1/3 innings at the major league level, he’s also been dogged by a string of injuries, from the shoulder strain that robbed him of eight weeks at the start of the season to an index finger infection that kept him sidelined for a minimum 10-day stay on the disabled list in June.
While he works his way back up to full strength yet again, rookie right-hander Nick Kingham is expected to cover for him and will make a spot start during the Pirates’ series finale against the Brewers on Sunday. The 26-year-old righty hasn’t started a single game for the team since August 1, and currently carries a 4.69 ERA, 2.7 BB/9, and 8.1 SO/9 over 71 innings out of the rotation and bullpen.