Phillip Winston Hennigan (April 10, 1946 – June 17, 2016) was an American right-handed Major League Baseball pitcher who played from 1969 to 1973 with the Cleveland Indians and New York Mets.

[1] Hennigan served in the United States Army and deployed as an artilleryman in the Vietnam War, where he received a medal for bravery.

[2] Pitching for the Reno Silver Sox, Hennigan went 3–8 with a 4.03 ERA and 82 strikeouts in 96 innings of work.

He made his Major League Baseball debut on September 2 of that year, pitching a third of an inning against the Minnesota Twins.

Hennigan made 41 relief appearances and one start for the Indians in 1970, going 6–3 with a 4.02 ERA, 43 strikeouts and 44 walks in 712⁄3 innings of work.

He was traded from the Indians to the Mets for Brent Strom and Bob Rauch at the Winter Meetings on November 27, 1972.

Hennigan gave up an inside-the-park home run to Atlanta's Ralph Garr, which happened when Met outfielders Don Hahn and George Theodore violently collided in Left-Center field.