The team hasn't officially reported for spring training yet, but the injuries have already begun for the Oakland A's. The team announced on Wednesday that right-hander Daniel Mengden had successful surgery on his right foot in Houston. According to the release, "Mengden fractured his medial tibial sesamoid bone while throwing a bullpen at home Jan. 31." The surgery involved a sesamoidectomy, according to the team, and Mengden will be in a walking boot for at least six weeks.
http://www.scout.com/mlb/athletics/story/1752187-young-a-s-starters-aim-... Before the injury, Mengden was one of the top contenders for the A's fifth spot in their starting rotation. The soon-to-be 24-year-old made his major league debut last season, just two years removed from college. He had a 6.50 ERA in 14 starts for the A's, but he was nearly unhittable in the minor leagues, posting a 1.46 ERA in 98 innings between Double-A and Triple-A. Mengden, a fourth-round pick of the Houston Astros in 2014, came to the A's in the Scott Kazmir deal in July 2015.
The injury is likely to take Mengden out of the running for an Opening Day rotation spot, but if he is able to make a quick recovery, he could still factor into the A's rotation plans for the majority of the season. Even with Mengden sidelined, the A's will have plenty of competition for the final two spots in their rotation this spring, with Jharel Cotton, Andrew Triggs, Frankie Montas, Raul Alcantara, Jesse Hahn, Zach Neal, Ross Detwiler and Chris Smith all entering camp with shots at a spot. Felix Doubront and Chris Bassitt will also be factors in the rotation picture once they are recovered from their 2016 Tommy John surgeries.