World number six Justin Thomas is excited to see his friend Tiger Woods tee it up alongside son Charlie at the PNC Championship family tournament this weekend, and Thomas's dad Mike thinks Woods fans are in for a treat.

"It's crazy how good he's hitting it and far he's hitting it for what he's been through," Mike Thomas said of 15-time major champion Woods, who suffered career-threatening leg injuries in a California car crash in February.

Woods has downplayed expectations for the event at the Ritz-Carlton Golf Club in Orlando, Florida, saying he's playing "as a dad".

But Mike Thomas -- a longtime club professional who teamed with Justin to win the event last year -- said he'd played a recent round with Woods and found it "impressive where he's at."

"He's got some speed, he's got some length. Hits a lot of really, really flush shots," the elder Thomas said after playing in a Thursday pro-am round. "I mean, I was surprised."

Woods has recently offered some tantalizing glimpses of his progress, posting videos of himself hitting balls on social media and putting in some practice sessions while hosting the Hero World Challenge in the Bahamas this month.