Bengals RB Joe Mixon (knee) will have knee scoped

Bengals running back Joe Mixon scheduled for arthroscopic surgery Saturday.

Cincinnati Bengals running back Joe Mixon returned to Thursday nights game against the Baltimore Ravens after injuring his right knee, but tests on Friday indicate he needs arthroscopic surgery, which he will undergo on Saturday, according to media reports.

Reports earlier said Mixon would seek a second opinion before opting for the surgery. There was no timetable given for his return following the surgery.

Mixon, who finished with 84 yards rushing in 21 carries against the Ravens, left the game in the first half, but came back to play in the fourth quarter and made a key 21-yard run to set up a field goal as Cincinnati (2-0) held off a Baltimore rally for a 28-23 victory.

I had to talk myself to going back in, Mixon said. Its mental toughness. It was real hard. It felt weird. The knee was hurting. The mental side of it is you always want to play 100 percent. When its bothering you, its hard mentally. I just had to check back in mentally and tough it out physically.

The 6-1, 228-pound Mixon was selected by the Bengals in the second round (No. 48 overall) of the 2017 draft out of Oklahoma and rushed for 626 yards and four touchdowns in addition to catching 30 passes for 287 yards as a rookie.

Mixon is off to a strong start this season, also rushing for 95 yards in the Bengals season-opening victory over the Indianapolis Colts.

Other running backs on the Cincinnati roster are Giovani Bernard, who will take over the starting role, rookie Mark Walton and Tra Carson.