Muthead
The Ability data below is for the maximum available upgrade tier.

X-Factor Ability Slot

Fearmonger
Shutdown
Unstoppable Force
Zone Hawk
Reinforcement
Run Stuffer
Momentum Shift

Superstar Ability Slot 1

Tip Drill
Homer
Clutch
Indoor Baller
Secure Tackler
Unfakeable

Superstar Ability Slot 2

Tip Drill
Homer
Clutch
Indoor Baller
Tackle Supreme
Enforcer
Secure Tackler
Reach Elite
Unfakeable
Acrobat
Strip Specialist
Lurker
Goal Line Stuff
Inside Stuff
No Outsiders
Out My Way
Lumberjack

Superstar Ability Slot 3

Tip Drill
Homer
Clutch
Indoor Baller
Tackle Supreme
Enforcer
Secure Tackler
Reach Elite
Unfakeable
Acrobat
Strip Specialist
Lurker
Goal Line Stuff
Inside Stuff
No Outsiders
Out My Way
Lumberjack