Complex sentence: When Brent Mydland, keyboardist of the Grateful Dead, died of a drug overdose on 26 July 1990, and after auditioning several players, including Pete Sears and Tony Lavitz, Welnick was selected, not least for his high vocal range for backup harmonies.
Split into simpler sentences: When Brent Mydland, keyboardist of the Grateful Dead, died of a drug overdose on 26 July 1990. After auditioning several players, including Pete Sears and Tony Lavitz, Welnick was selected, espcially due to his high vocal range for backup harmonies.