After a fourth-place finish in the men's 200-meter medley heat Thursday, Phelps responded Friday by winning the 100-meter butterfly at the 2015 AT&T Winter National Championships in Federal Way, Washington.
Phelps had to make a late charge to pass Tom Shields for the national title, winning by 0.03 seconds. USA Swimming tweeted out the winning result:
2nd national title in as many nights from @MichaelPhelps! Takes the 100m fly in 51.38 at #ATTNats pic.twitter.com/ZSvcbqiRZq
— USA Swimming (@USASwimming) December 5, 2015
Here's a full breakdown of the results:
| Place | Swimmer | Time |
| 1 | Michael Phelps | 51. |