Former Summit baseball player Slater de Brun slides into second base while playing for the Charleston RiverDogs, the Single-A minor league affiliate of the Tampa Bay Rays. (Charleston RiverDogs)Former Summit baseball player Slater de Brun slides into second base while playing for the Charleston RiverDogs, the Single-A minor league affiliate of the Tampa Bay Rays. (Charleston RiverDogs)Former Summit baseball player Slater de Brun has started in professional baseball career while playing for the Charleston RiverDogs, the Single-A minor league affiliate of the Tampa Bay Rays. Slater de Brun had just finished up the series as a player for the RiverDogs, the Class A affiliate of the Tampa Bay Rays. Less than two weeks after getting drafted, de Brun signed a $4 million signing bonus, according to spotrac.com.