Warren attended Cal Poly San Luis Obispo University. He finished his career with over 4,000 rushing yards, 673 receiving yards, and 35 touchdowns.
In 2001, with the Stampeders he led the CFL in kickoff returns and was second in punt return yardage (764).
He signed with the Lions prior to the 2004 season and replaced Kelvin Anderson as their starting running back. He had a career-high 1361 yards rushing in his first full season as a starter. He set a club record with 160 yards on 18 carries in a losing effort in the 2004 Grey Cup game against the Toronto Argonauts. This was the second-highest ever number of yards rushing in a Grey Cup game, trailing only Johnny Bright's 171 yards in 1956.
In 2005, he led the CFL in rushing touchdowns with 13 and ranked second overall with 16. He led the Lions in rushing for the second straight season and was fourth in the CFL with 2,179 combined yards.
- Antonio Warren at CFL.ca
| BC Lions starting running backs
2004 – 2005
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