J. J. Weaver (born November 30, 1999) is an American professional football outside linebacker. He played college football for the Kentucky Wildcats.
Weaver grew up in Fort Lauderdale, Florida before moving to Louisville, Kentucky before starting high school. He attended Moore Traditional School. As a senior, he had 70 tackles with 10 sacks and three interceptions. Weaver committed to play college football at Kentucky over offers from Louisville, Miami, and Purdue.
Weaver played in three games during his true freshman season and maintained a redshirt. He had 33 tackles with 6.5 tackles for loss during his redshirt freshman year. Weaver tore his ACL in Kentucky's game against Florida and missed the rest of the season. He returned the next season and had 33 tackles with 10.5 tackles for loss and led the Wildcats with 6.5 sacks.
Weaver signed with the Carolina Panthers as an undrafted free agent on July 25, 2025. He was waived on August 25.
Weaver was born with six fingers on his right hand.