Mendoza won the Men's Wheelchair Race of the London Marathon in 2004 in controversial circumstances after following a police motorbike through a shortcut on the course near the turn-around at The Cutty Sark, cutting the course short by approximately 200m.[2] He went on to finish the race with a comfortable lead ahead of British athlete David Weir and escaped disqualification. He went on to defend this title in 2005. He has also won the wheelchair division in the Twin Cities Marathon nine times.[3]
The 2008 Paralympic Games were his sixth and final Paralympic appearance, as he had previously announced he would retire from competition after the Games.[4] Online records indicate he competed in the 2012 Paralympics, and is currently active on Linked In, a professional networking group.
However, he returned to the sport to compete in the 2012 London Paralympic marathon on Sunday 9 September having earlier in the season set a new personal best of 1:24:23.[5]