The duo will re-unite with former Irish offensive coordinator Charley Molnar at Massachusetts, BlueandGold.com's Wes Morgan reports.
Walker entered Notre Dame from Christchurch (Va.) High School in 2008 as ESPN's No. 18 wide receiver and the 103rd overall player from his recruiting class. The 6-foot-3, 206-pounder appeared in just seven career games for the Irish, making one catch for 15 yards in 2009.
"It's really exciting just getting the opportunity to make something of myself," Walker said. "I had such high hopes coming out of high school, and not being able to execute on those plans was kind of a setback.
"It goes like that sometimes. You can't win them all. But big picture, I graduated, I had a blast over the last four years and hopefully I can go on to make something of myself in the realm of football. Looking back, it was definitely tough, but I can’t be that mad about it."
Williams landed in South Bend, Ind., from Elizabeth (N.J.) High School as ESPN's No. 19 defensive tackle in the Class of 2008. The 6-foot-1, 295-pound nose guard notched 19 total tackles and two tackles for loss in 24 career games at Notre Dame.
Here is a list of Notre Dame's fifth-year players who will be playing elsewhere in 2012:
QB Dayne Crist, Kansas
LB Anthony McDonald, Kansas
DT Brandon Newman, Ball State
TE Mike Ragone, Kansas
WR Deion Walker, UMass
DT Hafis Williams, UMass
Nose guard Sean Cwynar and offensive lineman Lane Clelland have told the Chicago Tribune and South Bend Tribune, respectively, that they will not pursue fifth years of football. I do not know of David Posluszny's plans. The other six fifth-years — Braxston Cave, Mike Golic Jr., John Goodman, Kapron Lewis-Moore, Dan McCarthy and Jamoris Slaughter — are back at Notre Dame for their final seasons.