After five glorious seasons of gritting and grinding, the Memphis Grizzlies appear (for the moment, at least) to have settled into the role of gatekeeper. They're good enough to knock off decent competition , win nine of 12 games and earn a mid-bracket playoff spot, but they just don't have the firepower to avoid big, bad losses against prospective top-flight title contenders. Hence the 30-point loss to the Cleveland Cavaliers, the franchise-worst 50-point loss to the Golden State Warriors, the 20-point loss to the San Antonio Spurs ... and, now, a 37-point loss to the Oklahoma City Thunder. [ Follow Dunks Don't Lie on Tumblr: The best slams from all of basketball] Oklahoma City turned a one-point game midway through the second quarter into an absolute laugher, outscoring Memphis 57-23 from the 5:14 mark of the second through the end of the third to leave FedExForum quiet, dispirited and just waiting for the pain to stop. After a fourth period played only to ensure the game stayed in compliance with league rules, the Thunder walked away with a 125-88 win that stands as the most lopsided home defeat of the Grizzlies' tenure in Memphis. (The Vancouver Grizzlies once lost by 47 at...