SANTA CLARA – The San Francisco 49ers held on to beat the Dallas Cowboys 30-24. Here are the 49ers’ numbers for this play.

QUARTERLY: A

Brock Purdy started shakily in the first half, as he stood still in the pocket like a statue and missed passes he would normally complete. But something changed in him at halftime, and in the second half he became nearly unstoppable, especially as a rusher. He finished the game with 56 rushing yards and a touchdown. When teams play him man-to-man, he can beat them with his legs just like he did tonight. He can’t win consistently if he stays in one spot. He has to use his legs.

RUNNING BACKS: A-MINUS

Jordan Mason aggravated his shoulder injury and left the game early, which could have been a death blow to the 49ers’ run-first offense. Luckily for them, Isaac Guerendo stepped up and gained 85 yards and a touchdown. He also missed a block that led to a crushing sack for Brock Purdy on the 49ers’ final possession. That was scary.

FULLBACK: C-MINUS

Kyle Juszczyk had one rushing yards, six receiving yards and a holding penalty, meaning he produced three negative net yards. A big night for him.

WIDE RECIPIENTS: B

Deebo Samuel had a 47-yard catch while lining up with the running back and playing against a linebacker. Besides this play, he didn’t do much other than catch a few screen passes, drop a few balls, and leave the game with a rib injury. Rookie Ricky Pearsall caught all four of his targets, gaining 39 yards on a jet sweep. He is a weapon in the running game.

TIGHT END: A.

George Kittle was the offense’s MVP this season. Tonight he had 6 catches for 128 yards and one touchdown. He’s heading into his third first-team All Pro season, meaning he’s likely a future Hall of Famer. His backup, Eric Saubert, committed a holding penalty that canceled out a long touchdown catch by Samuel.

OFFENSIVE LINE MAN: A.

They gave up just two sacks and paved the way for 223 yards on the ground. Granted, the Cowboys were missing their best defensive linemen, but the 49ers’ O-line still took care of business.

DEFENSIVE LINE MAN: B-PLUS

Nick Bosa and Sam Okuayinonu each recorded one sack and collectively this group shut down the Cowboys anemic running game. Okuayinonu in particular was a revelation this season. He’s definitely better than Leonard Floyd.

LINEBACKERS: B-PLUS

Fred Warner was excellent as usual. De’Vondre Campbell had his best game of the season, likely because the Cowboys don’t have a speedy running back who can make Campbell run. And Dee Winters left the game with a concussion.

DEFENSIVE BACKS: B

Deommodore Lenoir was excellent: he intercepted Dak Prescott again. You’d think Prescott would know who Lenoir is by now. He was the 49ers’ most improved player this season and one of the defense’s MVPs. The 49ers can’t extend his contract fast enough. Meanwhile, Charvarius Ward struggled, especially in the fourth quarter. First, he committed a 19-yard pass interference penalty on 3rd and 10, saving the Cowboys and giving them an automatic first down. Then the 49ers replaced him with Isaac Yiadom on a few occasions. When Ward returned, the Cowboys were in the red zone, and he promptly gave up a touchdown catch because he was playing zone coverage while the rest of the defense played man-to-man. Which means Ward made a mental mistake. Then on the next drive, safety Ji’Ayir Brown ran into rookie cornerback Renardo Green and gave up another touchdown catch. Closing games is such a problem for the 49ers.

SPECIAL TEAMS: A

For a change, they didn’t give up a touchdown and Anders Carlsen made all his kicks. This unit deserves a parade.

COACHES: C-PLUS

The 49ers came out flat and lost at halftime. Then Kyle Shanahan made the right adjustments at halftime and the 49ers scored 24 unanswered points. That was good Kyle. Then the 49ers nearly gave away a 17-point lead in the fourth quarter. That was Bad Kyle. With 3:25 to go and the 49ers leading by just 6 points, the offense was facing 2nd and 3, and for some strange reason Shanahan called a pass. No one blocked DeMarvion Overshown who blindsided Purdy and sacked him. The 49ers are extremely lucky that Purdy didn’t fumble. There was absolutely no reason to pass in that situation. Which means Kyle is almost Kyled. You know exactly what I mean. Luckily for the 49ers, Dak Dak had a harder time than Kyle ever could.