Cincinnati Reds first baseman Joey Votto was scheduled to have an MRI on his left knee, MLB.com reported Friday.
It is the same knee that Votto had surgery on twice in 2012 when he played just 111 games.
Votto stayed in Cincinnati following Thursday's doubleheader against the San Diego Padres while the rest of the team traveled to Philadelphia for this weekend's series against the Phillies.
The extent and cause of the injury are not clear but he could end up on the disabled list.
Votto has only driven in two runs in his last 16 games and is batting just .209 this month. Votto went 0-for-3 with three strikeouts in the second game of Thursday's doubleheader.
For the season, Votto is batting .257 with six home runs and 12 RBIs.