Stephen John Tkowski (born October 3, 1989), better known by his ring name T. K. O'Ryan, is an American retired professional wrestler.

O'Ryan made his Ring of Honor debut on October 1, 2016, in Lowell, MA as a part of The Kingdom (with Matt Taven and Vinny Marseglia).

[3][4] On December 2, 2016, The Kingdom became the first-ever ROH World Six-Man Tag Team Champions by defeating Kushida, Lio Rush, and Jay White.

[5] O'Ryan was injured on March 10, 2017, during the ROH 15th Anniversary Show when he jumped too far on an Asai Moonsault and broke his leg on a guard rail.

The following day, Silas Young replaced O'Ryan in a match, where The Kingdom lost the ROH World Six-Man Tag Team Championship to Bully Ray and The Briscoes.