Complex sentence: Márquez began his professional career after the Barcelona Games in 1992, and got off to an impressive start, winning his first 25 bouts to set up a shot at the Vacant IBF Light Middleweight Title against Anthony Stephens.
Split into simpler sentences: Márquez began his professional career after the Barcelona Games in 1992, and got off to an impressive start, winning his first 25 bouts. All those bouts set up a shot at the Vacant IBF Light Middleweight Title against Anthony Stephens.