Redskins running back Alfred Morris on his way to a 39-yard touchdown against the Tampa Bay Buccaneers (Ricky Carioti, The Washington Post)

Washington Redskins rookie running back Alfred Morris continued to blossom Sunday, rushing for a career-high 113 yards and a touchdown on 21 carries in his team’s 24-22 victory over the Tampa Bay Buccaneers.

 Morris, a sixth-round pick out of Florida Atlantic, became the third Redskins rookie in the last two seasons to  record a 100-yard game. As rookies last season, Roy Helu Jr. had three 100-yard games, and Evan Royster had two.

 Through four games, Morris has gained 376 yards and scored four touchdowns on 82 carries.

He joins Larry Brown, John Riggins, George Rogers, Earnest Byner and Terry Allen as the only Redskins backs since the 1970 league merger to open a season with four consecutive rushing performances of 75 yards or more.

 Morris did it  against Tampa Bay, which had allowed only 142 rushing yards through the first three games and was ranked first in the NFL against the run.

 “He’s been playing great every game,” Redskins coach Mike Shanahan said. “In the first half, I thought he played unbelievably. I thought their defense stepped up in the second half and played like they have throughout the year.”

 Morris’ touchdown came on the longest run of his young career. With his team facing first-and-10 from the Tampa 39, Morris ran to the left, cut to his right as he came through the line, bounced back toward the left as he broke a tackle and raced the rest of the way untouched.

 Morris said he was happy to surpass the 100-yard mark and to do it in his home state,  with family and friends in attendance. But earning the victory mattered most.

 “I tell people all the time, ‘I just run,’ which is what I do. I’ll do all I can to help my team win, and that’s what is important. We got a win today. It was tough. It was a nail-biter, but it was a win nonetheless.”