Mostert accepted a multi-year deal last offseason. Of course, that was long before his 29-carry, 220-yard, and four-touchdown performance against the Green Bay Packers in the NFC Championship Game. The running back would like to rework the deal, per the report, as an acknowledgment of his increased production.
This explains why Matt Barrows of The Athletic reported this week that the 49ers had at least discussed the possibility of a contract extension for Mostert.
"Mostert becomes an unrestricted free agent in 2022," wrote Barrows, "but, considering his contributions on special teams and on offense, is underpaid. That's the incentive to get a new deal done with him."
Mostert led the team with 772 rushing yards and eight rushing touchdowns on 137 carries last season. He expects to receive a heavier workload in 2020 and has prepared this offseason for the increased role.
"Right now, I'm just building myself up," Mostert explained in May. "I'm actually gaining some more muscle, which is kind of bizarre just because I haven't really been able to think about gaining muscle because I've already had muscle like that.
"Just trying to incorporate those things in my daily workouts, so that way, I'm able to take those hits and be one of those guys getting 200 carries. I've got to get prepared for that, and the only way that I know how is to get bulky and stronger."
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