A four-time Manager of the Year and three-time league champion, Greg Tagert returns for his 16th year with Gary SouthShore in 2020 and his 26th season managing in independent baseball.
Tagert arrived in Northwest Indiana in 2005, taking over a team that had set a league record for losses the previous season. His impact was immediate as the RailCats made the playoffs that season and won back-to-back five game series to win the Northern League Championship. After taking the RailCats to the brink of a title in 2006, the 2007 Gary SouthShore club collected a 58-38 regular season record and went on to win the title in another dramatic five-game series.
Tagert won his 700th career game in 2010. Originally from Vacaville, Calif., Tagert worked as a pitching coach for the University of New Mexico in 1988 and an associate scout for the Detroit Tigers in 1993-94. Tagert was a pitcher at San Francisco State University.
| Year | Club | League | Affiliate | Level | Record | Finish | Playoffs |
| 1995 | Ohio Valley | Frontier | — | Independent | 36-34 | 5th/8 | |
| 1996 | Brainerd | Prairie | — | Independent | 7-9 | ||
| 1997 | Evansville | Frontier | — | Independent | 46-33 | 2nd/8 | Lost Finals |
| 1998 | Evansville | Frontier | — | Independent | 43-36 | 4th/8 | Lost Semifinals |
| 1999 | Evansville | Frontier | — | Independent | 43-31 | T-3rd/10 | Lost Semifinals |
| 2000 | Evansville | Frontier | — | Independent | 45-38 | 4th/10 | Lost Finals |
| 2001 | Dubois County | Frontier | — | Independent | 48-36 | 3rd/12 | Lost Semifinals |
| 2002 | Dubois County | Frontier | — | Independent | 52-32 | 3rd/12 | Lost Semifinals |
| 2003 | Kenosha | Frontier | — | Independent | 47-42 | 7th/12 | |
| 2004 | Ozark | Frontier | — | Independent | 52-44 | 6th/12 | |
| 2005 | Gary SouthShore | Northern | — | Independent | 54-42 | 3rd/12 | League Champions |
| 2006 | Gary SouthShore | Northern | — | Independent | 51-46 | 3rd/8 | Lost Finals |
| 2007 | Gary SouthShore | Northern | — | Independent | 58-38 | 1st/8 | League Champions |
| 2008 | Gary SouthShore | Northern | — | Independent | 56-40 | 2nd/6 | Lost Finals |
| 2009 | Gary SouthShore | Northern | — | Independent | 57-39 | 1st/6 | Lost Finals |
| 2010 | Gary SouthShore | Northern | — | Independent | 52-48 | 4th/8 | Lost Semifinals |
| 2011 | Gary SouthShore | American Association | — | Independent | 54-46 | 5th/14 | |
| 2012 | Gary SouthShore | American Association | — | Independent | 50-50 | 8th/13 | |
| 2013 | Gary SouthShore | American Association | — | Independent | 58-41 | 3rd/13 | League Champions |
| 2014 | Gary SouthShore | American Association | — | Independent | 53-47 | 5th/12 | |
| 2015 | Gary SouthShore | American Association | — | Independent | 45-55 | T-8th/13 | |
| 2016 | Gary SouthShore | American Association | — | Independent | 52-48 | T-6th/12 | |
| 2017 | Gary SouthShore | American Association | — | Independent | 57-43 | T-4th/12 | Lost Semifinals |
| 2018 | Gary SouthShore | American Association | — | Independent | 59-41 | T-4th/12 | Lost Semifinals |
| 2019 | Gary SouthShore | American Association | — | Independent | 40-59 | T-8th/12 |
