The sports bar is very small. And the bartender has no control over what game is being played on the monitors. We were disappointed that we couldn't watch any of the football games we were hoping to see when we cruised in September. Hopefully they will have sense enough to show the World Series game in the Sports Bar, but don't be surprised if you get some lame excuse from the bartender!
We were much happier with the Sports Bar on the Adventure - it was on the Promenade, and much bigger than the one on the 12th deck of the Mariner!