He was a four-time Big 12 champion, a six-time All-American, and won the individual NCAA national championship in the 200-yard freestyle in 2008.

[1] Walters swam the first leg of the 4×200meter freestyle relay preliminaries (in 1:46.57) with Ricky Berens, Erik Vendt, and Klete Keller.

[2] In the final of the 4×200-meter freestyle relay, Michael Phelps, Ryan Lochte, Berens and Peter Vanderkaay swam a combined time of 6:58.56, a new world record.

Walters, with Michael Phelps, Ricky Berens and Ryan Lochte, swam a combined time of 6:58.55 to break the world record set last year in Beijing.

[9] In the 4×100-meter medley relay final, Walters, with Aaron Peirsol, Michael Phelps, and Eric Shanteau, swam a combined time of 3:27.28 to break the world record set last year in Beijing.