Peyton Manning isn’t Peyton Manning right now.

In his last four starts, the Broncos’ quarterback has combined for five touchdowns compared to six interceptions, and is averaging 224 yards passing (compared to 297 yards per game for the season) and completing 61.9 percent of his pass attempts (compared to 66.8 percent for the season). He’s looked so pedestrian that it’s fair to wonder whether Manning could be a roadblock in the Broncos’ quest for a Super Bowl.

This week on SiriusXM Sports, Warren Moon, Jason Goff and Will Carroll all gave their opinions as to why Manning has gone from having an all-time season to becoming a borderline liability under center.

WARREN MOON ON SIRIUSXM FANTASY SPORTS RADIO

I think it’s because he’s 38, 39 years old. When I was that old playing in the game, you tend to wear down as the season goes along. You really have…