Avery is only 33 but has not pitched in the majors since 1999. Avery was one of the best young left-handers in the NL at the beginning of the Nineties but has not had an ERA under 4.00 nor pitched 200 innings since 1993.
By the way, former teammates Greg Maddux and Avery were both born on April 14. Maddux is 4 years older. And Maddux has a 182 more career wins. Both made it to the majors at age 20. Through age 23 Avery led Maddux, 50 to 45 in wins.