Jon Kemmer, a former minor leaguer who played with the Astros, Twins and Dodgers, died over the weekend after getting into a rollover crash while returning home from coaching a youth baseball tournament, according to multiple reports. He was 35. Explore Jefferson, citing the Galveston County Medical Examiner’s Office in Texas, reported that Kemmer, while coming back from coaching the 14U HTX Battle Bucks at a tournament in Houston, was traveling on Farm to Market Road 2004 when his car left the