Season over for Cardinals closer Rosenthal, who needs Tommy John surgery

Updated: 

If the St Louis Cardinals are going to overtake the Milwaukee Brewers and the Chicago Cubs in the National League (NL) Central, they will have to do it without their hard-throwing closer.

Trevor Rosenthal was placed on the 60-day disabled list in MLB on Wednesday and will need Tommy John surgery to repair the ulnar collateral ligament in his right arm. 

The 27-year-old Rosenthal, an All-Star in 2015, is 3-4 on the year with a 3.40 ERA and 11 saves in 50 appearances. He had 76 strikeouts in just over 47 innings of work. 

Rosenthal was placed on the 10-day DL on August 16 when Cardinals manager Mike Matheny noticed his velocity was nowhere near his 98mph average in a 5-4 loss to the Boston Red Sox.

Rosenthal had struck out 38 percent of the batters he faced this season and was a big reason the Cardinals surged after the All-Star break. 

The Missouri native took over for Seung-Hwan Oh as the team's closer, a move that seemed to solidify the St Louis bullpen.

With Rosenthal now done for the year, the Cardinals called up left-handed relief pitcher Ryan Sherriff from Triple-A Memphis.

Sherriff, who was is 5-1 with a 3.19 ERA in 53 innings for Memphis, gives the Cardinals three lefties in their bullpen. 

On Wednesday, Cardinals general manager Michael Girsch said he hopes someone "seizes" the closer role.