Skipper Karn Sharma led from the front by notching up only his second century in his 12-year first-class career as Railways took firm control of the Ranji Trophy league game against hosts Mumbai at the Wankhede Stadium on Thursday.

Karn, who came in at No. 7 with his side tottering at 43-5, made an unconquered 112 off 146 balls. The Meerut-born left handed batsman struck four sixes—all off left arm spinner Shams Mulani, who finished wicketless after his 10-wicket match haul against Baroda in the previous game—and 13 fours in his 228-minute essay that commenced in the afternoon.