Celski was a part of the team that broke and currently holds the World Record in the 5000m relay established in Shanghai, China on November 12, 2017.

[5] Celski's breakthrough performance was at the 2009 World Short Track Speed Skating Championships where he won five medals (two gold, one silver, two bronze).

[7] Celski then combined with Eduardo Alvarez, Jonathan Sermeno, and Robert Lawrence in the 3000 m relay to finish first with a Junior World record time of 4:06.032.

[12] Celski then combined with Ryan Bedford, Jordan Malone, and Apolo Ohno in the 5000 m relay to finish first with a time of 6:51.400.

[13] The U.S. Short Track Speed Skating Olympic Trials were held September 8–12, 2009 in Marquette, Michigan.

Celski, along with Ohno, Jordan Malone, Travis Jayner and Simon Cho were the top five finishers at the trials.

The team, consisting of Apolo Ohno, Simon Cho, Travis Jayner, Jordan Malone and Celski, was in the fourth position for the majority of the race.

[19] With a strong push from Celski with two laps to go, Ohno as the anchor leg was able to pass the Chinese team for third place; Canada won the gold and South Korea took silver.

[25] Celski then combined with Jordan Malone, Travis Jayner, and Simon Cho in the 5000 m relay to finish second behind South Korea with a time of 6:46.205.

[29] On February 5, 2014, Celski was featured in a one-hour special on NBC television titled How to Raise an Olympian.

The program, hosted by Meredith Vieira, chronicles the journeys of seven U.S. Olympians and features interviews from parents and coaches along with home video and photos from each athlete's childhood.

[32] Before switching to speed skating after seeing the 2002 Winter Olympics, Celski was a national champion in-line skater.