Mario Miguel Guerrero Abud (born September 28, 1949) is a former Major League Baseball

Major League Baseball

Major League Baseball is the highest level of professional baseball in the United States and Canada, consisting of teams that play in the National League and the American League...

 shortstop

Shortstop

Shortstop, abbreviated SS, is the baseball fielding position between second and third base. Shortstop is often regarded as the most dynamic defensive position in baseball, because there are more right-handed hitters in baseball than left-handed hitters, and most hitters have a tendency to pull the...

 who played for four teams in an eight-year career from to .

Guerrero signed with the New York Yankees

New York Yankees

The New York Yankees are a professional baseball team based in the The Bronx, New York. They compete in Major League Baseball in the American League's East Division...

 as an amateur free agent in . After four plus seasons in their farm system, he was sent to the Boston Red Sox

Boston Red Sox

The Boston Red Sox are a professional baseball team based in Boston, Massachusetts, and a member of Major League Baseball’s American League Eastern Division. Founded in as one of the American League's eight charter franchises, the Red Sox's home ballpark has been Fenway Park since . The "Red Sox"...

 on June 30, as the player to be named later in the deal that brought future Cy Young Award

Cy Young Award

The Cy Young Award is an honor given annually in baseball to the best pitchers in Major League Baseball , one each for the American League and National League . The award was first introduced in 1956 by Baseball Commissioner Ford Frick in honor of Hall of Fame pitcher Cy Young, who died in 1955...

 winner Sparky Lyle

Sparky Lyle

Albert Walter "Sparky" Lyle is an American former left-handed relief pitcher who spent sixteen seasons in Major League Baseball . He was a closer from 1969 to 1977, first for the Boston Red Sox and then the New York Yankees. A three-time All-Star, he won the American League Cy Young Award in 1977...

 to the Yankees. Guerrero made the BoSox out of spring training

Spring training

In Major League Baseball, spring training is a series of practices and exhibition games preceding the start of the regular season. Spring training allows new players to try out for roster and position spots, and gives existing team players practice time prior to competitive play...

 , and won the starting shortstop job over Rick Burleson

Rick Burleson

Richard Paul Burleson is a former Major League Baseball shortstop. "Rooster," as he was nicknamed was a famously intense ballplayer...

 the following Spring

Spring (season)

Spring is one of the four temperate seasons, the transition period between winter and summer. Spring and "springtime" refer to the season, and broadly to ideas of rebirth, renewal and regrowth. The specific definition of the exact timing of "spring" varies according to local climate, cultures and...

 following Luis Aparicio

Luis Aparicio

Luis Ernesto Aparicio Montiel is a former shortstop in professional baseball. His career in Major League Baseball spanned three decades, from through . Aparicio played for the Chicago White Sox , Baltimore Orioles and Boston Red Sox . He batted and threw right-handed...

's retirement.

During the off season, Guerrero was traded to the St. Louis Cardinals

St. Louis Cardinals

The St. Louis Cardinals are a professional baseball team based in St. Louis, Missouri. They are members of the Central Division in the National League of Major League Baseball. The Cardinals have won eleven World Series championships, the most of any National League team, and second overall only to...

 for pitcher

Pitcher

In baseball, the pitcher is the player who throwsthe baseball from the pitcher's mound toward the catcher to begin each play, with the goal of retiring a batter, who attempts to either make contact with the pitched ball or draw a walk. In the numbering system used to record defensive plays, the...

 Jim Willoughby

Jim Willoughby

James Arthur Willoughby is a former relief pitcher in Major League Baseball who played for the San Francisco Giants , Boston Red Sox and Chicago White Sox...

. He split between the Cards and their triple A affiliate, the Tulsa Oilers, batting .239 in 64 games at the major league level. He was assigned to Tulsa in when he was traded to the California Angels

Los Angeles Angels of Anaheim

The Los Angeles Angels of Anaheim are a professional baseball team based in Anaheim, California, United States. The Angels are a member of the Western Division of Major League Baseball's American League. The "Angels" name originates from the city in which the team started, Los Angeles...

 for two minor leaguers.

He signed as a free agent with the San Francisco Giants

San Francisco Giants

The San Francisco Giants are a Major League Baseball team based in San Francisco, California, playing in the National League West Division....

 after the season only to be packaged in a trade to the Oakland Athletics

Oakland Athletics

The Oakland Athletics are a Major League Baseball team based in Oakland, California. The Athletics are a member of the Western Division of Major League Baseball's American League. From to the present, the Athletics have played in the O.co Coliseum....

 for Vida Blue

Vida Blue

Vida Rochelle Blue Jr. is a former Major League Baseball left-handed pitcher. During a 17-year career, he pitched for the Oakland Athletics , San Francisco Giants , and Kansas City Royals He won the American League Cy Young award and Most Valuable Player Award in 1971...

 during spring training . He played three seasons in Oakland before his contract was purchased by the Seattle Mariners

Seattle Mariners

The Seattle Mariners are a professional baseball team based in Seattle, Washington. Enfranchised in , the Mariners are a member of the Western Division of Major League Baseball's American League. Safeco Field has been the Mariners' home ballpark since July...

. He retired following his release from the M's in spring training . In , Guerrero played for the Winter Haven Super Sox

Winter Haven Super Sox

The Winter Haven Super Sox were one of the eight original franchises that began play in the Senior Professional Baseball Association in 1989. The club featured future Hall of Famer Ferguson Jenkins as part of its pitching staff. In the league's inaugural season, the Super Sox struggled and went...

 of the Senior Professional Baseball Association

Senior Professional Baseball Association

The Senior Professional Baseball Association was a winter baseball league based in Florida for players age 35 and over . The league began play in 1989 and had eight teams in two divisions and a 72 game schedule...

. He batted .315 in 15 games.

His brother Epy Guerrero

Epy Guerrero

Epifanio Guerrero is a baseball scout in the Dominican Republic who has signed more than 40 Major League Baseball players for the Houston Astros, New York Yankees, Toronto Blue Jays and Milwaukee Brewers. Epy is the brother of former shortstop Mario Guerrero, and has two sons, Epy Jr...

 was a coach for the Toronto Blue Jays

Toronto Blue Jays

The Toronto Blue Jays are a professional baseball team located in Toronto, Ontario, Canada. The Blue Jays are a member of the Eastern Division of Major League Baseball 's American League ....

. While working as a buscón (headhunter) in the Dominican Republic, Guerrero sued Raúl Mondesí

Raúl Mondesí

Raúl Ramón Mondesí Avelino is a former Major League Baseball player and the current mayor of San Cristóbal Province in the Dominican Republic. He was the National League Rookie of the Year in 1994 as a right fielder for the Los Angeles Dodgers...

for 1% of his salary. He ended up winning a $640,000 judgment.