Pittsburgh Steelers quarterback Mason Rudolph had an incredibly scary moment this past weekend, when he was knocked unconscious by Baltimore Ravens safety Earl Thomas.

The good news is that Steelers head coach Mike Tomlin said that Rudolph, who was diagnosed with a concussion, “appears to be doing fine,” per Josh Alper of Pro Football Talk.

However, there is no timetable for Rudolph's return, with Tomlin saying “when he’s available to us, he’s available to us.”

Rudolph was at Pittsburgh's team facility on Monday and seemed to be in good spirits, one day after going to the hospital to be evaluated.

Of course, Rudolph will have to clear concussion protocol before he is eligible to return.

The second-year signal-caller was pressed into action back in Week 2 when Ben Roethlisberger left the Steelers' loss to the Seattle Seahawks due to an elbow injury.

It was then revealed that Roethlisberger would be out for the season, which vaulted Rudolph into the starting role.

In four appearances and three starts, Rudolph has thrown for 646 yards, seven touchdowns and a couple of interceptions while completing 67 percent of his passes and posting a passer rating of 102.5.

He had completed 13 of his 20 passes for 131 yards and a touchdown before exiting the loss to the Ravens this past weekend.

The 24-year-old, who played his collegiate football at Oklahoma State, was originally selected by the Steelers in the third round (76th pick overall) of the 2018 NFL Draft.

Pittsburgh has gotten off to a 1-4 start this season and will take on the Los Angeles Chargers next Sunday.