Michael Edward "Mikey" Welsh (April 20, 1971 – October 8, 2011) was an American artist and musician, best known as the former bassist of Weezer. He played with Weezer frontman Rivers Cuomo during Cuomo's time in Boston during the hiatus in the band Homie. Following original bassist Matt Sharp's decision to leave Weezer to focus on his group, The Rentals, Welsh was chosen to take over on bass.