Mark J. Rebilas-USA TODAY Sports

The Kansas City Chiefs reportedly have their heir apparent to Chad Henne.

The team is signing former first-round pick Blaine Gabbert to be the primary backup to Patrick Mahomes, according to reports from the Pat McAfee Show and ESPN on Tuesday.

Henne announced his retirement immediately after claiming his second Super Bowl ring with the Chiefs, who beat Philadelphia in February's Super Bowl LVII. Henne backed up Mahomes for the past four seasons.

Gabbert, 33, played the last three seasons in Tampa Bay, backing up Tom Brady.

Gabbert is 13-35 for his career as a starter after Jacksonville selected him No. 10 overall in the 2011 draft out of Missouri.

He's thrown for 9,302 yards and 51 touchdowns against 47 interceptions for five teams. He went 5-22 in two-plus seasons as the starter in Jacksonville.

The Chiefs also have quarterback Shane Buechele on the roster.

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