Willard Roland "Nemo" Gaines (December 23, 1897 – January 26, 1979) was an American military officer and baseball player.

He served as an officer in the United States Navy and played briefly as a Major League Baseball (MLB) pitcher with the Washington Senators.

[2] After graduating, he received a special leave from the Navy to pitch for the Washington Senators of Major League Baseball (MLB).

[7] In total, Gaines appeared in four games for the Senators between June 26 and July 16, 1921, pitching 4+2⁄3 innings while giving up five hits, two walks and no runs.

[8] Gaines was the only Navy Midshipman to play in MLB until Mitch Harris made his big league debut with the St. Louis Cardinals in 2015.