Ryan Weiss (born December 10, 1996) is an American professional baseball pitcher for the Hanwha Eagles of the KBO League.

[6] After the season's end, he was selected by the Arizona Diamondbacks in the fourth round of the 2018 Major League Baseball draft.

[11] In 2021, Weiss began the year with the Amarillo Sod Poodles of the Double-A Central and was promoted to the Reno Aces of the Triple-A West in July.

[16] On July 1, 2022, Weiss was claimed off waivers by the Kansas City Royals and optioned to the Triple-A Omaha Storm Chasers.

On April 15, 2024, Weiss signed with the High Point Rockers of the Atlantic League of Professional Baseball.

[24][25] Weiss appeared in his first game for the Eagles on June 25, striking out seven Doosan Bears batters in six scoreless innings of work.

Alongside veteran major leaguers Hyun-jin Ryu and Jaime Barría in the starting rotation, Weiss contributed to the team posting a 14–10 record in August and making a surprise late entry into the race for the KBO playoffs.

Weiss notably struck out 12 SSG Landers on August 16, and recorded a win against the champions–to–be Kia Tigers in his final outing of the year on September 27.