John Bowman, who became editor of the San Mateo County Times earlier this month, quit the MediaNews-owned paper abruptly last week, the Press Club has learned. The circumstances of his exit weren’t immediately known. He had replaced Jennifer Aquino, who has become assistant city editor of the San Jose Mercury News. Bowman had previously served as editor of MediaNews Group’s Hayward Daily Review since December 2004. Before that, he was editor at the San Mateo County Times for two years.