Gronkowski accomplished the feat in the third quarter on a 16-yard strike from quarterback Tom Brady. He also had an 8-yard touchdown reception in the first quarter to give the Patriots a 7-0 lead.
The previous record of seven was shared by Dave Casper and Vernon Davis.
Gronkowski finished the day with seven catches for 83 yards and two touchdowns.
Gronk sets playoff TD mark for tight ends
Patriots QB Tom Brady tosses a 16-yd touchdown to tight end Rob Gronkowski, allowing Gronkowski to set the record for most playoff touchdowns by a tight end.