First off, Thunder left-hander Mike Dunn has been added to the Northern Division roster for the All-Star Game, to be played on July 15.

Dunn replaces Reidier Gonzalez of the Fisher Cats, who is injured, but was fine a few days ago against the Thunder.

Also leaving the roster is Akron's Vinnie Pestano, who will be replaced by the Aeros' Carlton Smith.

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Additionally, the Thunder released details about the Home Run Derby, which will take place before the All-Star Game.

Here's the press release:

HR DERBY PARTICIPANTS
Brian Dopirak :

Brian Dopirak leads the Eastern League in home runs with 19. The Crystal Beach, Florida native has appeared in 85 games for the Fisher Cats in 2009 and has a .313 batting average with 68 RBI which also leads the Eastern League. The first baseman was selected by the Chicago Cubs in the second round of the 2002 June draft. He was released by Chicago after the 2007 season and signed a free agent contract with the Toronto Blue Jays.

Jorge Vazquez :

Jorge Vazquez is ranked 8th in the Eastern League with 12 home runs. The Culiacan, Mexico native has appeared in 52 games for the Trenton Thunder this season and has batted .332 with a team leading 51 RBI and a team high .584 slugging percentage. Vazquez also appeared in five games for Mexico in the 2009 World Baseball Classic and batted .294 with one home run and five RBI. Prior to the 2009 season, the first baseman spent 10 seasons in the Mexican League and sported a .321 career batting average in 627 games with 151 home runs and 491 RBI.

Rene Tosoni :

Rene Tosoni is tied for 11th in the Eastern League with 10 home runs. The Toronto, Ontario native has appeared in 81 games for the New Britain Rock Cats and leads the team in home runs, games played, walks (36), runs scored (45), slugging percentage (.483), and RBI (49). Tosoni was drafted by the Twins in the 36th round of the 2005 June draft. The outfielder will also appear in the XM All Star Futures Game on July 13th at Busch Stadium in St. Louis.

Michael Taylor :

Michael Taylor is ranked 4th in the Eastern League with 15 home runs. The Apopka, Florida native is the No. 6 ranked prospect and "Best Power Hitter" in the Phillies Minor League System according to Baseball America. The outfielder has appeared in 82 games for Reading this season and he leads the team in batting average (.336), home runs, RBI (64) and hits (102). Taylor was selected by the Phillies in the 5th round of the 2007 draft out of Stanford University.

Brennan Boesch :

Brennan Boesch is ranked 2nd in the Eastern League with 17 home runs. The Santa Monica, California native has appeared in 81 games for the Erie Sea Wolves this season and leads the team in home runs, RBI (56) and hits (83). The outfielder was selected by the Tigers in the 3rd Round of the 2006 June draft out of the University of California at Berkeley.

Nick Weglarz :

Nick Weglarz is tied for 6th in the Eastern League with 13 home runs. The Stevensville, Ohio native has appeared in 82 games for the Akron Aeros this season and leads the team in RBI (58). The outfielder is the No. 3 ranked prospect in the Indians Minor League System according to Baseball America. He was selected by the Indians in the 3rd round of the 2005 June draft.

Frank Menechino :

Frank Menechino is the Trenton Thunder hitting coach. He played in the majors from 1999-2005 for the Oakland Athletics and Toronto Blue Jays. He played second base, shortstop, third base and designated hitter. In his 7 year Major League career he hit a total of 36 HR and drove in 149 runs. Menechino played in the 1996 Double A All-Star game at Waterfront Park.

Mark Zagunis :

Mark Zagunis just completed his sophomore season at Holy Cross High School in Delran, NJ. In 24 games this season, Mark batted .524 with 33 hits, 7 doubles, 2 triples, and 7 home runs (3rd in Burlington County Scholastic League). Zagunis homered at Waterfront Park on Sunday, May 17 in the Burlington County Scholastic League Championship against Delran High School.

Mike Fassl :

Mike Fassl is a rising senior at New Egypt High School in New Eygpt, NJ. The catcher played in all 24 of his team's games during his freshman and sophomore years before being limited to just 9 games last season with an ACL injury. In his 57 game high school career, he has 5 HR, 49 RBI and a .344 batting average. He has participated in the Trenton Thunder Showcase and Blue Grey Classic at Waterfront Park.