The injury-prone San Francisco 49ers are monitoring yet another health issue, this one involving quarterback Brock Purdy’s right shoulder.

Coach Kyle Shanahan said on Monday that Purdy emerged from the team’s 20-17 home loss to the Seattle Seahawks a day earlier with a sore throwing shoulder. Purdy is considered day-to-day as the 49ers prepare for a Sunday road game against the Green Bay Packers.

Purdy passed for a season-low 159 yards against Seattle, connecting on 21 of 28 attempts with one touchdown pass and one interception. He also ran five times for 40 yards and a score.

A Pro Bowl performer last season while helping San Francisco reach the Super Bowl, Purdy is completing 66 percent of his passes this season for 2,613 yards and 13 touchdowns with eight interceptions.

Neither of his backups, Brandon Allen and Joshua Dobbs, has thrown a pass this season.

Purdy joins a lengthy list of injured 49ers that added Nick Bosa on Sunday. The star defensive end sustained an oblique/hip ailment that kept him out late in the game, and his absence was conspicuous as the Seahawks drove for the winning touchdown in the final minute.

Shanahan said regarding the chances of Bosa returning to face the Packers, “There’s just as good of a chance for him to not play as play.”

San Francisco tight end George Kittle sat out Sunday because of a hamstring injury.

“He should practice on Wednesday,” Shanahan said Monday. “I know it was close (Sunday), so I think he should be good for practice on Wednesday.”

Shanahan added he was unsure whether cornerback Charvarius Ward would return this week after sitting out two games following the death of his 1-year-old daughter.