(CBS) Cubs outfielder Albert Almora Jr. left his team’s game at St. Louis on Tuesday night with a right shoulder contusion after colliding with the wall in the fifth inning.

X-rays were negative, the Cubs said.

Almora was chasing a double that was rolling in the gap when he stumbled on the warning track and awkwardly went head-first and shoulder-first into the left-center field wall. Almora immediately hit the ground in pain, and trainers worked on his shoulder for a time. He walked off the field under his own power.

Almora is hitting .295 with seven homers and 45 RBIs this season.

Leonys Martin replaced Almora in center field. The Cardinals led 6-3 at the time with no outs in the bottom of the fifth.

The Cubs’ magic number to clinch the NL Central is one.