Peyton Manning Bungles 1st Pitch At MLB All-Star Game, What Was That?!

Peyton Manning looked absolutely nothing like one of the greatest athletes ever on Tuesday ... botching the ceremonial first pitch at the MLB All-Star Game -- and it was pretty terrible.

The former Broncos QB was tapped by baseball officials to kick off the big night at Coors Field in Denver ... and, boy, did he disappoint in the role.

Check out the clip ... Manning took the bump, reared back with an ugly wind-up, and then fired a fastball that didn't even reach home plate.

Seriously, it wasn't good.

In fact, the ball bounced so far from being a strike ... it had to be knocked down by Rockies pitcher German Marquez to save Peyton from all-time embarrassment.

You can tell from the footage, even Manning was disappointed with the toss ... he shook his head and threw up his hands before receiving the ball back from Marquez.

Of course, Manning's been retired from being a star athlete for more than 5 years now ... so maybe the 45-year-old deserves a pass here.