Rangers starter Yu Darvish pitched late in the season with sciatica, a lower back injury, the Dallas Morning News reports.
Although Darvish was less efficient than usual -- he never made it to the sixth inning in his last three starts -- he was still effective. He posted a 2.40 ERA with 37 strikeouts against 14 walks in his final five starts (30 innings), so the back injury shouldn't be anything to worry about going forward.