Joshua Michael Johnson (born January 31, 1984), nicknamed "JJ", is an American former professional baseball pitcher.

Johnson made his major league debut September 10, 2005, for the Marlins with a scoreless inning of relief against the Philadelphia Phillies.

After spending all of April in the Florida bullpen, Johnson emerged as a major contributor in the Marlins' young, but surprisingly successful, starting staff.

[6] Johnson also placed fourth in voting for the National League Rookie of the Year,[7] an award that went to his fellow Florida teammate, shortstop Hanley Ramírez.

[8] He recovered surprisingly quickly and made his return to the Major Leagues on July 10, 2008, only eleven months after having undergone surgery.

Johnson finished the 2010 season second in the Majors in ERA (2.30), leading the National League, trailing only Félix Hernández of Seattle.

In 2012, Johnson was named the Opening Day starter for the Marlins for the third straight year, although he was coming off from a shoulder inflammation injury.

On November 19, 2012, Johnson was traded to the Toronto Blue Jays along with Mark Buehrle, José Reyes, John Buck, and Emilio Bonifacio, in exchange for Jeff Mathis, Adeiny Hechavarria, Henderson Álvarez, Yunel Escobar, Jake Marisnick, Anthony DeSclafani, and Justin Nicolino.

[citation needed] On May 31, the Blue Jays announced that Johnson would be activated from the disabled list and start against the San Francisco Giants on June 4.

Johnson earned his second win of the season on August 6, against the Seattle Mariners, in what would turn out to be his final major league game.

[19] Johnson finished the 2013 season on the disabled list, and posted a dismal 2–8 record, a 6.20 earned run average, and 83 strikeouts over 811⁄3 innings.

[7][21] The Padres organization reported on March 22, 2014, that Johnson would open the season on the disabled list due to a strained right forearm/elbow muscle, and was initially expected to miss at least 4–5 weeks.

[27] Attempting another comeback from Tommy John surgery, Johnson signed a minor league contract with the San Francisco Giants on November 1, 2016.

His father spent his years growing up in Calgary, Alberta before the family relocated to the U.S.[30] Johnson himself was born in Minneapolis a short time later in 1984.