Dennis Edward Neagle Jr. (/ˈneɪɡəl/; born September 13, 1968) is an American former Major League Baseball pitcher who played for six teams over a 13-year career.

Neagle attended Arundel Senior High School in Gambrills, Maryland and played on the baseball team.

That year, Neagle represented the Pirates at the All-Star Game and led the National League in innings pitched (209+2⁄3) and hits allowed (221).

The next day, the Braves traded a young Jason Schmidt to Pittsburgh for Neagle in the midst of their playoff run.

Neagle made the start for the Braves in the first regular season game at Turner Field, taking place on April 4, 1997.

Neagle's 16–11 record and 3.55 ERA in 1998 were still solid numbers, but the emergence of Kevin Millwood made him expendable and he was traded to the Cincinnati Reds after the season.

The playoff-bound New York Yankees traded prospects Drew Henson, Jackson Melián and Ed Yarnall to acquire Neagle along with outfielder Mike Frank on July 12, 2000.

In December 2000, the Colorado Rockies signed Neagle and fellow left-hander Mike Hampton to expensive contracts.

Then, in late November 2004, a Lakewood, Colorado, police officer ticketed him for soliciting a woman for oral sex.