Henderson Javier Álvarez (born April 18, 1990) is a Venezuelan professional baseball pitcher who is a free agent.

He has previously played in Major League Baseball (MLB) for the Toronto Blue Jays from 2011 through 2012, the Miami Marlins from 2013 through 2015, and the Philadelphia Phillies in 2017.

Álvarez signed with the Toronto Blue Jays as an international free agent, and made his professional baseball debut in 2007 with the Dominican Summer Blue Jays of the Rookie-level Dominican Summer League, pitching to a 1–2 win–loss record with a 5.61 earned run average (ERA).

He was promoted to the Lansing Lugnuts of the Single–A Midwest League for the 2009 season, where he was an All-Star with a 9–6 win–loss record and a 3.47 ERA.

He was again named an All-Star and made his second appearance in the Futures Game, finishing the year with an 8–4 record and a 2.86 ERA.

He took the rotation spot of Carlos Villanueva, and made his major league debut on August 10 against the Oakland Athletics[3][4] pitching 52⁄3 innings and giving up 3 earned runs on 8 hits, with 4 strikeouts and 1 walk.

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

He was activated from the 60-day disabled list on July 4, and made his first start as a Marlin that night against the Atlanta Braves.

[9] Álvarez received a no-decision in his Marlins debut, pitching five innings and giving up three earned runs in a 4–3 win.

He became the first pitcher to throw a no-hitter in the final game of the regular season since Mike Witt in 1984, when he did so for the California Angels.

[12] After earning an 8–5 record with a 2.48 ERA and a league-leading three shutouts, Álvarez went on the disabled list on August 1 with shoulder inflammation.

[18] On December 2, the Marlins opted not to tender Álvarez a contract, making him a free agent.

[22] The Athletics outrighted Álvarez to the Nashville Sounds of the Triple–A Pacific Coast League on October 7, 2016,[23] and he then elected for free agency.

On October 4, Álvarez was removed from the 40–man roster and sent outright to Lehigh, but he rejected the assignment and elected free agency.

[30] In 24 games (4 starts) for the Triple-A Fresno Grizzlies, he compiled a 1–4 record and 5.94 ERA with 37 strikeouts across 53 innings of work.

[31] On September 18, 2020, after the American Association season, Álvarez was returned to the Tigres de Quintana Roo.