Thomas Lynn Trebelhorn (born January 27, 1948) is an American former manager inMajor League Baseball for theMilwaukee Brewers (1986–91) andChicago Cubs (1994). He was the manager of the Class ASalem-Keizer Volcanoes from 2008 to 2012.

Tom Trebelhorn
Tom Trebelhorn in 2006
Manager
Born: (1948-01-27)January 27, 1948 (age 77) Portland, Oregon, U.S.
MLB debut
September, 1986, for the Milwaukee Brewers
MLB statistics
Managerial record	471–461
Winning %	.505
Managerial record atBaseball Reference
Teams
As manager Milwaukee Brewers (1986–1991) Chicago Cubs (1994) As coach Milwaukee Brewers (1984) Chicago Cubs (1992–1993) Baltimore Orioles (2001–2007)

Trebelhorn was born inPortland, Oregon. Trebelhorn was married since 2000 to formerSummerfest director and Milwaukee mainstay Bo Black, until her death on July 24, 2020.^[1]

Trebelhorn was drafted in the sixth round of the1970 Major League Baseball draft by theBend Rainbows, a newly formedshort-season Class A team independently owned by theHawaii Islanders, aAAA club that was itself affiliated with theCalifornia Angels.^[2][3] He spent five years as aminor leaguecatcher andinfielder for the Islanders (and by extension their affiliates the Angels and, later,San Diego Padres) andOakland Athletics organizations.

After his playing career ended, he served in several managerial and coaching stints in the minor league organizations of theOakland Athletics,Cleveland Indians, andPittsburgh Pirates before being named as the first base coach of the Milwaukee Brewers in 1984. In 1975 and 1976, he managed the Boise A's in the Oakland Athletics' Minor League Organization, and it was during this stint (1976) that he was instrumental in teaching future Hall of FamerRickey Henderson the intricacies of base stealing, based on remarks made by Henderson at his induction ceremony to the 'Hall' on July 27, 2009.^[4]

He was named manager of the Brewers' top farm team, theVancouver Canadians of thePacific Coast League, in 1985, whom he guided to the league title. The following year saw him back in the majors as the club's third base coach. He was awarded the Brewers' managerial position after the retirement ofGeorge Bamberger with nine games remaining in the 1986 season. In the previous four seasons before Trebelhorn, the Brewers had finished fifth or worse each time, doing so by margins of at least eleven games.

Milwaukee started off 1987 with a bang, winning thirteen games in a row; by the time April ended, they were 18–3. May would prove a disaster, signified by a twelve game losing streak (May 3 to May 19), which resulted in them being 24–21 at the end of May, the only month where the Brewers had a losing record in. While the Brewers played consistent ball the rest of the season, they never threatened to close on top of the American League East, and they finished seven games behind for a third place finish. However, it proved a great improvement over recent seasons which garnered him Manager of the Year awards fromBaseball America andSports Illustrated; he finished second in the voting for AL Manager of the Year.^[5] Trebelhorn led the 1988 Brewers to an 87–75 record; middling months in April, June, and July meant that the Brewers could not move past the hump in the division, despite the fact they finished in a tie for third place and missed the division crown by two games. The next season was another fourth-place finish for an 81–81 record, falling eight games short of the division. The 1990 season saw them plummet to sixth with a 74–88 record. In his final year with the team, the Brewers went 83–79 and finished fourth in the division by eight games. At the time he was fired, he had the most wins amongBrewers managers with 422 beforePhil Garner (his successor as manager) passed him, and Trebelhorn ranks fourth as of 2022.

Trebelhorn was named bench coach of the Chicago Cubs in 1992. He was a finalist for theSan Francisco Giants managerial job in the winter of that year, being one of the final five candidates interviewed, butDusty Baker was chosen for the position.^[6] He was promoted to manager of the Cubs to replaceJim Lefebvre on October 13, 1993 over bullpen coachTony Muser by general managerLarry Himes; this was the eleventh Cubs manager hired in the past eleven years.^[7] Trebelhorn would have a brief tenure as manager with one noteworthy moment. Following a slow start in which the Cubs failed to win their first eight home games, Trebelhorn promised reporters that if the Cubs lost the next game, he'd answer questions from fans (the Cubs had never lost their first nine home games in a season up to that point). On April 29, 1994, when the Cubs did in fact lose their next game at home, he held court outside a fire station on Waveland Avenue and spoke to a mob of roughly 200 Cubs fans, starting by shouting "OK. Now what do you want to know?"^[8] The Cubs lost their next three home games before finally winning at home on May 4, breaking a mark of 0–12 at home to start the season, worst in Cubs history.^[9] The strike that occurred in August of that year stopped the team from doing worse than their record of 49–64 (.434), and he was fired on October 17 by new general managerEd Lynch.^[10] He was replaced byJim Riggleman.

Later that year, he returned to the minor leagues as the first manager of theTri-City Posse of the newly formedWestern Baseball League, directing the club to the league finals. Following this, he was hired to be the minor league coordinator of instruction for theBaltimore Orioles, his first front office position. He served in this role for three years, and afterwards as the Orioles' director of player development and director of organizational instruction for one year each.

In 2001, Trebelhorn was promoted to be the Orioles' third base coach. Midway through the 2005 season, he was transferred to the position of bench coach, taking over the role fromSam Perlozzo, who was named interim manager. In 2006, Trebelhorn returned to his former position of third base coach. For the 2007 season, he once again took over as the Orioles' bench coach. He was fired at the end of the 2007 season.^[11]

He took on the role of manager again in 2008 for the Class ASalem-Keizer Volcanoes,^[12] a position in which he served through the 2012 season.

In 2009, Trebelhorn was selected by theItalian national team to be a coach for the 2009World Baseball Classic.^[13]

• Career statistics fromBaseball Reference (Minors), orRetrosheet 
• Tom Trebelhorn managerial career statistics atBaseball-Reference.com
• Salem-Keizer Volcanoes official website