Martinez was escorted off the mound by team trainers and removed from the game as a precautionary measure. The right-hander will be re-evaluated tomorrow.
The 24-year-old was seeking his 15th victory on the year, which is the second most on the team behind Michael Wacha's 17 wins. Martinez leads the team with 184 strikeouts.
Entering Friday night, Martinez has tossed a 179 1/3 innings on the year after 89 1/3 in 59 appearances in 2014.
Left-handed pitcher Tyler Lyons came out of the bullpen in to retire the side.
The Cardinals lead the National League Central division by 3 1/2 games over the Pittsburgh Pirates. The Cardinals and Pirates are the first two National League teams to clinch playoff berths.
- Christopher Chavez