According to Sportsnet.ca:
Jason (The Athlete) MacDonald will make his return to the Octagon at UFC 129 in Toronto, taking on Ryan Jensen on April 30, sportsnet.ca has learned.
Sources told sportsnet.ca that both parties have agreed and contracts should be signed by Saturday morning.
Jason "The Athlete" MacDonald (24-14)
Loss John Salter - TKO (Leg Injury) UFC 113
Win Matt Horwich - Decision (Unanimous) LGIO MMA 1
Win Vernon White - Submission (Triangle Choke) W-1 MMA 4
Ryan Jensen (15-4)
Loss Court McGee - Submission (Arm-Triangle Choke) UFC 121
Win Jesse Forbes - Submission (Guillotine Choke) UFC 114
Loss Mark Munoz - Submission (Punches) UFC 108