Complex sentence: Frank Chance and Joe Cantillon then invited Waddell to join a barnstorming team that travelled to California, where he was convinced to stay and joined the Los Angeles Loo Loos in a league that a year later would become the Pacific Coast League.
Split into simpler sentences: Frank Chance and Joe Cantillon invited Waddell to join a barnstorming team that travelled to California. While there, Waddell was convinced to stay and joined the Los Angeles Loo Loos in a league that one year later would become the Pacific Coast League.