Gregory John Mahlberg is a retired American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 professional baseball

Baseball

Baseball is a bat-and-ball sport played between two teams of nine players each. The aim is to score runs by hitting a thrown ball with a bat and touching a series of four bases arranged at the corners of a ninety-foot diamond...

 catcher

Catcher

Catcher is a position for a baseball or softball player. When a batter takes his turn to hit, the catcher crouches behind home plate, in front of the umpire, and receives the ball from the pitcher. This is a catcher's primary duty, but he is also called upon to master many other skills in order to...

, manager

Manager (baseball)

In baseball, the field manager is an individual who is responsible for matters of team strategy on the field and team leadership. Managers are typically assisted by between one and six assistant coaches, whose responsibilities are specialized...

 and coach

Coach (baseball)

In baseball, a number of coaches assist in the smooth functioning of a team. They are assistants to the manager, or head coach, who determines the lineup and decides how to substitute players during the game...

. He threw and batted right-handed, stood 5 feet 10 inches (1.78 m) tall and weighed 185 pounds (84 kg).

Mahlberg attended Wisconsin Lutheran High School

Wisconsin Lutheran High School

Wisconsin Lutheran High School, commonly referred to as WLHS or Wisco, is a secondary school located in Milwaukee, Wisconsin that was originally part of Lutheran High School , thus making it is the oldest Lutheran high school in America...

 in Milwaukee and the University of Wisconsin–Milwaukee. He was signed by the Texas Rangers

Texas Rangers (baseball)

The Texas Rangers are a professional baseball team in the Dallas-Fort Worth Metroplex, based in Arlington, Texas. The Rangers are a member of the Western Division of Major League Baseball's American League, and are the reigning A.L. Western Division and A.L. Champions. Since , the Rangers have...

 as an undrafted free agent in and appeared briefly in 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...

 for the Rangers in 1978

1978 Texas Rangers season

The 1978 Texas Rangers season involved the Rangers finishing 2nd in the American League West with a record of 87 wins and 75 losses.- Offseason :...

-79

1979 Texas Rangers season

The 1979 Texas Rangers season involved the Rangers finishing 3rd in the American League West with a record of 83 wins and 79 losses.- Offseason :...

, collecting two hits

Hit (baseball)

In baseball statistics, a hit , also called a base hit, is credited to a batter when the batter safely reaches first base after hitting the ball into fair territory, without the benefit of an error or a fielder's choice....

 in 18 at bats for an .111 career batting average

Batting average

Batting average is a statistic in both cricket and baseball that measures the performance of cricket batsmen and baseball hitters. The two statistics are related in that baseball averages are directly descended from the concept of cricket averages.- Cricket :...

. As a minor leaguer

Minor league baseball

Minor league baseball is a hierarchy of professional baseball leagues in the Americas that compete at levels below Major League Baseball and provide opportunities for player development. All of the minor leagues are operated as independent businesses...

, he batted .241 in 705 games spread over ten seasons (1973–82).

He began his managing career in 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...

 farm system in 1983, and spent 15 years as a minor league pilot, also working for the Chicago Cubs

Chicago Cubs

The Chicago Cubs are a professional baseball team located in Chicago, Illinois. They are members of the Central Division of Major League Baseball's National League. They are one of two Major League clubs based in Chicago . The Cubs are also one of the two remaining charter members of the National...

, Milwaukee Brewers

Milwaukee Brewers

The Milwaukee Brewers are a professional baseball team based in Milwaukee, Wisconsin, currently playing in the Central Division of Major League Baseball's National League...

 and Tampa Bay Devil Rays. His career record was 904 victories, 1,050 defeats (.463). He managed in the Class A California League

California League

The California League is a Class A Advanced minor league baseball league which operates throughout the state of California. Before 2002, it was classified as a "High-A" league, indicating its status as a Class A league with the highest level of competition within that classification, and the fifth...

 for eight seasons and at one point held the league record for victories by a manager with 526; Lenn Sakata

Lenn Sakata

Lenn Haruki Sakata is a former professional baseball player who played in the Major Leagues primarily as a utility player from 1977–1987 and was a member of the Baltimore Orioles 1983 World Series Championship team. He was the second Asian American to play Major League Baseball. He is Yonsei...

broke the mark in .