With his fingerprint a match for the high-tech locks that open FedExForum, O.J. Mayo moonlights quite often these days. It was well after 9 p.m. last Saturday night when the Grizzlies guard sauntered onto the practice court and hoisted shots with a friend. Then, teammate Tony Allen arrived and they launched hundreds more. Mayo is proud of his after-hours work. And the Grizzlies are benefiting from the productivity that has come from the extra practice as Mayo has been more efficient lately while officially on the clock. With a 17-point outing during the Grizzlies' 111-104 victory over the San Antonio Spurs on Sunday, Mayo finished off his most constructive scoring stretch in some time. The sometimes-struggling, sometimes-super sub has converted 18 of his last 39 field goal attempts (46 percent), which included deft 3-point shooting. Of his last 15 shots from beyond the 3-point arc, he has buried 10. And four came in the second half of that important win over the Spurs. "One thing about Juice is that he's a competitor," Allen said. "He loves to win. When a person has that much fire in him, with his talent and the way he shoots, it's a great attribute to our team. "For him to get through all that (he has gone through), that just shows mental toughness. I'm glad he's my teammate." Mayo had long put behind him being moved to the bench, having a fight with Allen on a team flight and serving a 10-game suspension for violating the league's anti-drug policy. What inspired his late-night hoops summit was an 0-of-5 outing March 14 against the Los Angeles Clippers.