Donald Brashear will make his MMA debut on June 4 against a relatively unknown heavyweight.According to Nic Landry of RDS , the former NHL enforcer has agreed to face Martin Trempe (0-2) in a heavyweight bout at Ringside MMA 11 in Quebec City. The fight, which will be officially announced at a press conference in Quebec City on Thursday, will mark Brashear's first pro MMA bout.The 39-year-old Brashear currently plays in the Ligue Nord-Americaine de Hockey. He played in the NHL for the Montreal Canadiens, Vancouver Canucks, Philadelphia Flyers, Washington Capitals and New York Rangers. The 6-foot-3, 237-pound American-Canadian racked up 2,634 penalty minutes in 1,025 NHL games from 1993-2010.He has been training for his MMA debut at Nordik Fight Club in Quebec City."Right now, we are quite impressed with his technical skills," Ringside MMA president Eric Champoux told MMA Fighting. "He's a quick learner."According to Champoux, Brashear has signed a one-year contract with the promotion. However, both parties can part ways after the June 4 fight.Both of Trempe's fights haven't gone passed the first round. He quit between rounds in November and lost via TKO in January.The main event of Ringside MMA 11 will feature a 190-pound catchweight bout between former UFC fighters Patrick Cote and Todd Brown.