SANTA CLARA, Calif. – While it remains to be seen if he will be ready for the Oct. 20 game against the Kansas City Chiefs, San Francisco 49ers running back Jordan Mason received good news Friday about his ailing left shoulder.

Mason suffered a sprained AC joint in his left shoulder during Thursday night’s win over the Seattle Seahawks, Niners coach Kyle Shanahan said. Shanahan said Mason will be there every day when San Francisco begins preparing for the Chiefs on Monday.

“We consider it good news,” Shanahan said. “I mean, it doesn’t guarantee (next) week or anything. He does have an AC sprain, but it was positive that it wasn’t worse than that. It’ll be day to day and hopefully he’ll be good for the game , but no guarantees.”

Mason injured the shoulder with 9:37 left in the second quarter. After a 14-yard run, Mason landed hard on the shoulder after a tackle by Seahawks safety Julian Love. Mason walked to the sideline and stood there for a while before heading to the locker room.

Originally listed as questionable to return, Mason was back on the field for the first offensive snap of the third quarter. He gained 8 yards by running to the right, but Shanahan said he knew something didn’t feel right and Mason went back to the sideline. He did not return to the game, although Shanahan said he was available in case of emergency.

Rookie Isaac Guerendo and veteran Patrick Taylor Jr. picked up the slack as the Niners rushed for 228 yards on 33 carries.

“I thought they both did really well,” Shanahan said. “We didn’t really miss a beat with it. They kept the whole rhythm of the offense going. They hit the right holes, they ran hard and made some plays for us, so they were prepared and didn’t hesitate when they got their points.” possibilities.”

Mason finished with 73 yards on nine carries and caught a pass for 9 yards. Mason’s 609 rushing yards lead the NFL while other runners have to catch up in their sixth game this weekend. Mason also has three rushing touchdowns while filling in for injured star running back Christian McCaffrey (Achilles tendonitis).

“Jordan is as strong as anyone, so I’m sure if he gets the chance to play, he will,” Shanahan said. “But (we) have to see how the shoulder responds.”

Mason wasn’t the only notable injury for the 49ers on Thursday night. For the second straight game, San Francisco had a kicker injured while trying to make a tackle on a kickoff return. Matthew Wright, who just signed with the team on Tuesday, suffered a shoulder injury while trying to take down Seahawks returner Dee Williams with 1:17 left in the game. According to Shanahan, the shoulder “came out for a while” but went back in.

As of Friday afternoon, the Niners were still awaiting full MRI results on Wright’s shoulder, though Shanahan appeared to be bracing for the possibility that San Francisco could get its third kicker in as many weeks when they play Kansas City.

“We’re waiting on this MRI, so it’s definitely a good possibility that we need to do something,” Shanahan said. “But I thought Matt did really well and took a big step for us, with those three kicks being three on three. I don’t want him to have to make those tackles, but respect for him, his body in there, wishing that it didn’t matter, but hopefully everything will be fine for him.”

Wright signed with the Niners on Tuesday after kicker Jake Moody suffered a high ankle sprain while trying to make a tackle against the Cardinals. Moody is expected to miss several weeks.

San Francisco brought in several kickers for a tryout last week before signing Wright. Wright made all three of his field goal attempts and all three of his extra points against the Seahawks.