For traction, ventilation and flexibility, the Nike cleat cannot be beat. As to whether the U.S. men's baseball team will be undefeated, that remains to be seen. Who to watch: Brett Anderson, Jake Arrieta, Brian Barden, Matthew Brown, Trevor Cahill, Jeremy Cummings, Jason Donald, Brian Duensing, Dexter Fowler, John Gall, Mike Hessman, Kevin Jepsen, Brandon Knight, Mike Koplove, Matt LaPorta, Lou Marson, Blaine Neal, Jayson Nix, Nate Schierholtz, Jeff Stevens, Steven Strasburg, Taylor Teagarden, Terry Tiffee and Casey Weathers.