Complex sentence: Crothers formed his own band in the 1930s and traveled to Oakland California with the band in 1948, he played piano at the Port O'Call and Walt's 405 Club.
Split into simpler sentences: Crothers formed his own band in the 1930s and traveled to Oakland, California with the band in 1948. He played piano at the Port O'Call and Walt's 405 Club.