Career
He was drafted twice, first in the 1985 NFL Draft by the Dallas Cowboys and finally in the 1986 NFL Draft by the Eagles. He played college football at Texas Agricultural and Mechanical.
Dallas Cowboys
Darwin was drafted in the fifth round of the 1985 NFL Draft (119th overall) by the Dallas Cowboys. He had a contentious negotiation with the team and didn"t reach a contract agreement during the season.
Philadelphia Eagles
After not signing with any team during the 1985 season, he re-entered the NFL Draft and was selected by the Philadelphia Eagles in the 4th round (106th overall) of the 1986 NFL Draft.
After experiencing another contract holdout, he replaced an injured Gerry Feehery and started 10 games at center as a rookie. The next year he was moved to left tackle, where he would remain as the starter for three years.
On December 21, 1989 he was placed on the injured reserve list with a left knee injury. The next year he had problems with the same knee and missed several games.
He was waived on September 3, 1991.