On Day 0, eligible subjects will be randomized in a 1:1:1 ratio to receive a single dose of either EXPAREL 133 mg in 10 mL expanded in volume with 10 mL of normal saline for a total volume of 20 mL (Group 1); EXPAREL 266 mg in 20 mL (Group 2); or placebo 20 mL (Group 3). Study drug (EXPAREL or placebo) will be administered in a blinded manner via an ultrasound guided single-dose femoral nerve block at least 1 hour prior to surgery. Prior to placement of the prosthesis, 8 mL of bupivacaine hydrochloride (HCl) (0.5%) diluted with 8 mL of normal saline will be administered by the surgeon as a periarticular infiltration to the posterior capsule (8 mL medially and 8 mL laterally).