San Francisco 49ers third-year running back Matt Breida left Sunday's game against the Washington Redskins and is being evaluated for a concussion, per the San Jose Mercury's Cam Inman on Twitter.

The undefeated 49ers have looked at Breida as a source of offensive enlightenment—he has rushed for 376 yards and scored one touchdown while tallying 73 receiving yards for a touchdown in five games during the 2019 season. San Francisco initially signed Breida, a Georgia Southern product, as an undrafted free agent in 2017.

The 24-year-old Breida has been a pleasant surprise for the offense while Kyle Shanahan's defense has dominated games, too. Breida put up 814 rushing yards and 261 receiving yards in his second season with the team last year.

Coming off a year largely missed with an ACL tear, Niners quarterback Jimmy Garoppolo has yet to live up to his lofty expectations considering how well he had played prior to his injury. With the passing game as inconsistent as it is, Breida has been a source of stable offensive attack, averaging 5.8 yards per carry.

Joining Breida in the backfield are veteran journeyman running back Raheem Mostert and 26-year-old ex-Atlanta Falcons rusher Tevin Coleman, who are second and third, respectively, on the team's rushing yards behind Breida. Coleman and Mostert's combined rushing contributions just barely eke out what Breida has provided for the 49ers on his own.

Second-year undrafted running back Jeff Wilson leads the backfield in rushing touchdowns, however, with four through three games.