Scott Heinig, 22, died on Sunday after suffering a head injury at a Fifth Street party on Picnic Day night.
Police responded to the party around 8:30 p.m. on Saturday and said they believe that alcohol may have been a factor. Heinig was taken to the UC Davis Medical Center in Sacramento where he was in critical condition.
Heinig worked as a pitching coach at Davis Senior High and was a pitcher for the UC Davis baseball team before graduating in 2010 with a degree in economics.