Drafted by the Baltimore Orioles in the 17th round of the 1989 Major League Baseball draft, Zaun reached the majors with the Orioles in June 1995.[3][4] He was used primarily as a back-up early in his career. He batted .231 with one home run and 13 runs batted in (RBI) in 39 games with the Orioles in 1996 before being optioned on August 6 to the Rochester Red Wings where he hit .319 in 14 games. He was sent to the Florida Marlins on August 23 to complete a transaction from two days prior on August 21 when Terry Mathews was acquired by the Orioles.[5] After winning a World Series with the Marlins in 1997, he became their starting catcher to finish out the 1998 season when Charles Johnson and then Mike Piazza were traded. He then moved to the Texas Rangers prior to the 1999 season. He has also played with the Kansas City Royals, Houston Astros, and Colorado Rockies. He signed as a free agent with the Blue Jays prior to the 2004 season. Valuable in the line-up as a switch-hitter, he set a career high in 2005 with 133 games.[6]
2006–2011
Prior to the 2006 season, the Blue Jays signed Bengie Molina as the everyday catcher, making Zaun the backup.[7] Zaun started 2006 on the injured list, with Jason Phillips serving as Molina's backup during the first week of the year. Zaun hit a game-winning two-run homer off the Tampa Bay Devil Rays' Jason Childers in his return on April 8.[8] Molina's struggles against right-handed pitchers caused John Gibbons to platoon the two, with Molina generally starting against left-handed pitchers and Zaun playing against righties. On September 13, 2006, he hit home runs from both sides of the plate in the same game.[9] He was only the fourth Blue Jay in history to do this.
Because the Blue Jays actively pursued Rod Barajas of the Texas Rangers as the club's new starting catcher during the 2006 offseason, it was assumed that Zaun would be exploring free agency as signing Barajas would mean Zaun would be maintained as a backup. Meanwhile, negotiations between Zaun and the club deteriorated, as Zaun claimed that the Jays offered "slightly better than back-up money for playing every day".[10] Negotiations with Barajas went as far as an offer conditional on a routine physical, but eventually fell apart for undisclosed reasons.[11] After turning down a reported $6.5 million two-year offer from the Blue Jays a week earlier,[12] Zaun officially accepted a two-year, $7.25 million contract offer to return to the Blue Jays as their starting catcher on November 28, 2006. The new contract deal also included a third-year option, guaranteed based on appearances.[13] The signing came after Zaun was rumored to have been courted by the Boston Red Sox and New York Yankees, both in backup roles.[11]
Arguably his most famous play with the Jays was hitting a game-winning grand slam in the bottom of the 13th inning off of Tampa Bay Rays closer Troy Percival, on September 6, 2008, with two outs in the inning, wiping out the Rays, 7–4.[14] Zaun hit only the second game-winning grand slam in Jays history but it was the first that occurred in extra innings, and even more spectacular was that his team was losing at the time, due to an RBI single by Dioner Navarro to put the Rays up, 4–3, before the slam at the top of the 13th.
Zaun was claimed off waivers by the Tampa Bay Rays GM Andrew Friedman in exchange for Rhyne Hughes on August 7, 2009.[16][17] On August 16, Zaun hit a pinch hit grand slam home run against his old team, the Blue Jays, in the eighth inning off Brandon League on a 3–2 fastball.[18] On November 12, 2009, Zaun was granted free agency.
On December 4, 2009, Zaun signed a one-year contract with the Milwaukee Brewers for $1.9 million.[19] After suffering a severe injury, Zaun's 2010 season—and, as it turned out, his MLB career, ended on May 20.[20] After the season, Milwaukee declined his contract option, and he became a free agent on November 2.[21]
In January, Zaun signed a minor league deal with the San Diego Padres, with an invitation to spring training.[22] However, noting that he still had not recovered from his previous injury enough to play regularly, he chose to retire on March 7, 2011.[23]
Mitchell Report
In 2007, Zaun was included in the Mitchell Report following a 20-month investigation into the use of performance-enhancing drugs by former Senator George Mitchell. In the report, Kirk Radomski claimed he sold Deca-Durabolin and Winstrol to Zaun in 2001, after a referral from Jason Grimsley. Radomski produced a cheque from Zaun for $500. Mitchell also explained that former Montreal Expos bullpen catcher Luis Perez claimed to have supplied Zaun with steroids in 2002. Zaun declined to be interviewed for the report.[24]
On February 15, 2008, Zaun responded in detail to the allegations made in the report after issuing a denial as soon as it came out.[25] Zaun vehemently denied taking performance-enhancing drugs, stating that he owed Grimsley $500 and that Grimsley re-wrote the cheque to purchase drugs for himself.[25] Zaun explained, "I can say, with 100% certainty, that the cheque was not to buy performance-enhancing drugs. It's obvious to me what parts of the cheque are my writing".[25]
Post-playing career
Broadcasting career
Zaun started his broadcasting career after the Blue Jays closed out their 2006 season. Throughout the playoffs, Zaun would offer his thoughts on how the teams and players were doing, and how he thought they could improve.
After his retirement, on March 14, 2011, Zaun signed a two-year contract with Rogers Sportsnet to become their studio MLB analyst.[26] He also served as a part-time analyst on Sportsnet Radio Fan 590 and the Blue Jays Radio Network. As part of his duties he blogged on his website 'zauntourage.com'[27] (now defunct).
On May 10–11, 2011 Zaun filled in as the color commentator on the NESN broadcast of a Red Sox series against the Blue Jays when the normal broadcaster, Jerry Remy was ill.[28]
On November 30, 2017, Rogers Communications announced Zaun's employment had been terminated after an investigation into complaints of improper conduct from several female employees.[29] Zaun issued an apology in response to the allegations on December 4.[30]