Play Tourney Pick’em | Fill out your bracket | Print it | Celebrity Challenge Whether it’s Florida Gulf Coast’s improbable run to the Sweet 16 two years ago, Davidson coming within a shot of the Final Four in 2008 or George Mason actually getting there in 2006, the NCAA tournament has delivered some memorable Cinderella stories.  Here’s a look at four mid-majors with double-digit seeds and a chance to do some damage this year. Note that Wichita State and Northern Iowa were not considered here since they’re favored in their opening games, nor were double-digit seeds from power conferences like Texas or UCLA. Stephen F. Austin (29-4, 17-1) League: Southland (First place) Seed: 12th seed, South Region Round of 64 opponent: No. 5 Utah Potential round of 32 opponent: No. 4 Georgetown or No. 13 Eastern Washington RPI/KenPom: 33/35 Why the Lumberjacks are dangerous: Guard Thomas Walkup and forward Jacob Parker are among the returning standouts from the Stephen F. Austin team that stunned fifth-seeded VCU in the opening round last year in San Diego. The Lumberjacks are no one-hit wonder either, having won at Memphis, gone to overtime with Northern Iowa and run away with their conference for the second straight year. The formula for success for Stephen F. Austin is an efficient, unselfish motion offense and a trapping defense that speeds up the tempo and forces turnovers on 23 percent of opposing possessions. The Lumberjacks are the highest rated No. 12 seed in the KenPom rankings and are actually above every single No. 9 seed as well. Their opponent round opponent is a Utah team that has lost four of its last seven games after a 21-4 start and has struggled most against long, athletic teams who rebound and defend. That’s not