Lopez, 33, of Newcastle, pleaded guilty in November 2011 to assault and battery by means of force likely to cause death.
He was sentenced in January 2012 to 15 years in prison and 15 years' probation.
2 others made deals
Co-defendants Jimmy Don Smith, 30, of Tuttle, and Joshua Bernard Rinken, 30, of Norman, made deals with prosecutors and pleaded guilty.
Each received 10 years in prison and 10 years' probation as punishment.
Peery was assaulted late Feb. 15, 2011, while trying to escort customers out of Dan O'Brien's Public House at the request of the bartender.
Prosecutors said Rinken put the officer in a headlock, injuring his neck, and Smith repeatedly punched the officer in the head.
Don Jackson, Lopez's attorney, said prosecutors are punishing his client because he rejected a plea agreement and later changed his mind.
In February, a judge denied a request by Lopez to withdraw his guilty plea, a ruling upheld by the state Court of Criminal Appeals.
“He took his chances and pleaded guilty, was sentenced, and now wishes he had taken the original offer,” First Assistant District Attorney Scott Rowland said.
“It's that simple.”