From Wikipedia, the free encyclopedia Mexican Joe Rivers (born Jose Ybarra, March 19, 1892 – June 26, 1957) was a lightweight boxer whose ring career lasted from 1910 to 1923. Rivers was born in Los Angeles on March 19, 1892 to Andrew Ybarra. He was a fourth generation Californian. He was of Spanish-Indian descent. On February 22, 1911, he defeated Jimmy Reagan, a former Bantamweight World Champion by a technical knockout in the thirteenth round of a scheduled twenty. Reagan took a "terrific ...