Patrick Mahomes is 37-19 in his career against playoff teams (regular and postseason)

That's good for a .660 win%. If that were Mahomes' career win% against all teams, it would rank 15th all time, behind the following quarterbacks: Otto Graham, Daryle Lamonica, Tom Brady, Roger Staubach, Lamar Jackson, Joe Montana, Peyton Manning, Josh Allen, Jim McMahon, Terry Bradshaw, Danny White, Ben Roethlisberger, Frank Ryan, and Ken Stabler.

.660 is also higher than the career win% of the following 21 hall of famers: Steve Young, Johnny Unitas, John Elway, Aaron Rodgers, Jim Kelly, Norm Van Brocklin, Brett Favre, Bart Starr, Len Dawson, Bob Griese, Dan Marino, Y.A. Tittle, Drew Brees, Kurt Warner, Troy Aikman, Bobby Layne, Fran Tarkenton, Dan Fouts, Warren Moon, Joe Namath, and Sonny Jurgensen.

Against non-playoff teams, Mahomes is 69-7, good for a .908 win%.