Jack Henry López (born December 16, 1992) is a Puerto Rican professional baseball infielder in the Seattle Mariners organization.

[3] López began his professional career in 2012, splitting the season between the Rookie-level Idaho Falls Chukars and the Single-A Kane County Cougars.

[4] The following year, López was promoted to the High-A Wilmington Blue Rocks, where he batted .230/.297/.301 with 4 home runs and 45 RBI.

He appeared in 96 games for the Triple-A Gwinnett Stripers of the International League in 2019, batting .273 with 12 home runs and 57 RBI.

He began the season with the Double-A Portland Sea Dogs, and was promoted to the Triple-A Worcester Red Sox.

[8] López was on Boston's taxi squad in late August, traveling with the major-league team as a potential roster replacement.

[9] He was added to Boston's active roster on September 1,[10] and made his MLB debut that evening against the Tampa Bay Rays.

[14] López played in 95 games for the Triple-A Toledo Mud Hens, batting .167/.205/.287 with 6 home runs, 34 RBI, and 11 stolen bases.

[27][28] López's uncle Onix Concepción was a shortstop for the Kansas City Royals,[29] including their 1985 World Series team; he also played one game with the Pittsburgh Pirates.