Validation Data: Stop Typos & Spelling Mistakes

I have a spreadsheet that I'm using for a college football pool. We have almost 100 players, and have it set up for each player to pick up to 20 games each week. There is a sheet for each week of the season. Now, I copy each players picks from a message board and paste them under that players name. My problem is, that some people don't spell the teams correctly or abbreviate when they were told not too. This leads to them missing the points because excel sees it as a wrong entry. What I wantto accomplish is setting up some way to have excel verify the spelling is correct when the players entries are pasted in the sheet. I would also like it to auto-correct errors it finds...say a player types in Ohio St. but the winner is entered as Ohio State...This would be seen as a wrong entry for Ohio St. so I want excel to recognize it and correct it. Also simple spelling errors as well...