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Guillermo Alejandro Moscoso (born November 14, 1983) is a Venezuelan professional baseball pitcher for the Pericos de Puebla of the Mexican League. He has played in Major League Baseball (MLB) for the Texas Rangers, Oakland Athletics, Colorado Rockies and San Francisco Giants.

Guillermo Moscoso
20140309 Guillermo Alejandro Moscoso pitcher of the Yokohama DeNA BayStars, at Yokohama Stadium.JPG
Moscoso with the Yokohama DeNA BayStars
Pericos de Puebla – No. 8
Born: (1983-11-14) November 14, 1983 (age 35)
Maracay, Venezuela
Batted: Right Threw: Right
Professional debut
MLB: May 30, 2009, for the Texas Rangers
NPB: June 4, 2014, for the Yokohama DeNA BayStars
Last appearance
MLB: September 29, 2013, for the San Francisco Giants
NPB: 2016, for the Yokohama DeNA BayStars
MLB statistics
Win–loss record13–14
Earned run average4.28
NPB statistics
Win–loss record17–22
Earned run average4.27


Detroit Tigers organizationEdit

As a member of the Oneonta Tigers, Moscoso pitched the second perfect game in New York–Penn League history in a 6–0 victory over the Batavia Muckdogs on July 15, 2007.[1]

Texas RangersEdit

Moscoso was acquired by the Texas Rangers from the Detroit Tigers along with pitcher Carlos Melo for catcher Gerald Laird on December 12, 2008.

On May 30, 2009, Moscoso made his major league debut against the Oakland Athletics, striking out 2 and pitching a scoreless ninth inning.[2]

After appearing in ten games in '09, Moscoso had an ERA of 3.21 through 14.0 innings pitched, giving up 15 hits, 7 runs, and 6 walks but also struck out a dozen. As of August, Moscoso has only pitched one game in the new decade. On May 20, against Baltimore, Guillermo pitched two-thirds of an inning, giving up two hits, two runs, and two walks while also striking out two. His ERA is currently 27.00.

Oakland AthleticsEdit

In January 2011, Texas traded Moscoso to the Oakland for Ryan Kelly.[3]

On May 24, 2011, he was recalled to the Oakland Athletics to take the place in the rotation of Tyson Ross, who went on the DL with a strained left oblique. Fautino de los Santos was optioned to Triple-A to make room.[4]

On September 7, 2011, he carried a no hitter against the Kansas City Royals into the eighth inning.

Colorado RockiesEdit

On January 16, 2012, Moscoso was traded, along with fellow pitcher Josh Outman, to the Colorado Rockies for outfielder Seth Smith.[5] Moscoso went 3-2 with a 6.12 ERA with 50 innings in 23 appearances, 3 starts.

Kansas City RoyalsEdit

The Kansas City Royals claimed Moscoso off waivers on November 2, 2012.[6] The Royals released him on March 13, 2013.[7]

Toronto Blue JaysEdit

The Toronto Blue Jays announced that they had claimed Moscoso on waivers on March 16, 2013.[8]

Chicago CubsEdit

On March 27, 2013, Moscoso was claimed on waivers by the Chicago Cubs.

San Francisco GiantsEdit

On July 26, 2013, Moscoso was traded to the San Francisco Giants for a player to be named later or cash considerations.[9] He was designated for assignment on November 20, 2013. On November 21, 2013 Moscoso elected to become a Free Agent.

Yokohama DeNA BayStarsEdit

On December 26, 2013, it was announced that Moscoso had signed with the Yokohama DeNA BayStars of Nippon Professional Baseball for 2014.[10]

Bravos de LeónEdit

On May 7, 2017, Moscoso signed with the Bravos de León of the Mexican Baseball League.

Los Angeles DodgersEdit

On February 7, 2018, Moscoso signed a minor league deal with the Los Angeles Dodgers. He appeared in 16 games (13 starts) for the AAA Oklahoma City Dodgers with a 4.90 ERA. He was released on June 29, 2018.

Return to LeónEdit

On July 3, 2018, Moscoso signed with the Bravos de León of the Mexican League. He became a free agent following the season, but later re-signed with the team on April 23, 2019.

Pericos de PueblaEdit

On July 2, 2019, Moscoso was traded to the Pericos de Puebla of the Mexican League.

Pitching styleEdit

Moscoso throws three main pitches: a four-seam fastball (90–92), a curveball (77–79), and a changeup to left-handed hitters (80–81). He has experimented with a cut fastball and slider to right-handers, but he does not use them frequently.[11] After he went to Japan, he learned a two-seam fastball.

See alsoEdit


  1. ^ Blinn, Michael. "Tigers' Moscoso pitches perfect game". Retrieved 2019-08-14.
  2. ^ Moscoso looks good in MLB debut
  3. ^
  4. ^ Stiglich, Joe (2011-05-23). "Oakland A's update: Reliever Brian Fuentes questions the way he's been used by manager Bob Geren". San Jose Mercury. Retrieved 2011-05-24.
  5. ^ "Rockies acquire RHP Guillermo Moscoso and LHP Josh Outman from Oakland in exchange for OF Seth Smith". January 16, 2012. Retrieved August 14, 2019.
  6. ^ "Royals claim RHP Moscoso, C Hayes off waivers". Associated Press via Yahoo 2 November 2012. Retrieved 2 November 2012. Italic or bold markup not allowed in: |publisher= (help)
  7. ^ Royals To Release Guillermo Moscoso
  8. ^ "Blue Jays claim Moscoso". March 16, 2013. Retrieved March 16, 2013.
  9. ^ "San Francisco Giants acquire pitcher Guillermo Moscoso from the Chicago Cubs". July 26, 2013. Retrieved July 26, 2013.
  10. ^ Casella, Paul (December 26, 2013). "Righty Moscoso to sign with Japanese team". Retrieved January 4, 2014.
  11. ^ "Brooks Baseball · Home of the PitchFX Tool - Player Card: Guillermo Moscoso". Brooks Baseball. Retrieved 14 June 2012.

External linksEdit