Cardinals' Alex Reyes undergoes Tommy John surgery on Thursday

St. Louis Cardinals starting pitcher Alex Reyes underwent Tommy John surgery on his right elbow on Thursday.

What It Means:

Reyes will miss the entire 2017 season, and likely won't be able to return in time for the beginning of the 2018 season either. The pitchers vying for his place in the rotation this season include Michael Wacha, Luke Weaver and Trevor Rosenthal.

Reyes excelled during his first stint in the majors, as he posted a 1.57 ERA, 1.22 WHIP and 27.5 strikeout percentage across 46 innings (five starts) in 2016.