NFL 2026
JA #40
FB · #40 Buffalo Bills

Jackson Acker

Fullback · Wisconsin

A versatile Wisconsin lead blocker who signed with one of the few NFL teams still committed to the fullback position.

Jackson Acker spent his college career at Wisconsin working as a lead blocker and occasional tight end, developing the versatility that made him an appealing undrafted signing for the Buffalo Bills in 2026. He joins a Buffalo offense that, under coach Joe Brady, is one of the few in the league still using a true fullback.

Converted all eight third- and fourth-down carries into first downs (2025)
Praised by Wisconsin coach Luke Fickell for his positional versatility
Signed with Buffalo Bills as undrafted free agent (2026)

Path to the league

Acker played for Wisconsin from 2021-2025, lining up primarily as a fullback while also gaining experience at tight end. He went unselected in the 2026 NFL Draft and signed with the Bills as an undrafted free agent on May 8, 2026.

Career highlights

Wisconsin head coach Luke Fickell called Acker one of the more versatile players in college football, citing his ability to line up in multiple spots. In his final season, Acker converted all eight of his third- or fourth-down carries into first downs.

2025 season recap

In his last year with the Badgers, Acker was used mostly as a lead blocker, carrying the ball 15 times for 55 yards, with all eight of his short-yardage carries resulting in first downs. He signed with Buffalo as an undrafted free agent after the 2026 draft, entering camp as a potential replacement for longtime Bills fullback Reggie Gilliam.

Sources

  • Wikipedia: Jackson Acker
  • Buffalo Rumblings: Buffalo Bills 2026 scouting report - fullback Jackson Acker

Player Profile

40
Jersey
6' 1"
Height
247 lbs
Weight
Rookie
Experience

Background

Position
Fullback
Group
offense
College
Wisconsin
Hometown
Madison, WI, USA
Age
23
Status
active