A destructive all-rounder and master of the limited-overs game, Mascarenhas had long secured hero status in Hampshire when he thumped five consecutive sixes in a one-day international against India in 2007.
While his batting relies largely on brute force, his bowling is a complete contrast of subtle variations at a gentle medium pace.
On his day, Mascarenhas possesses the ability to change a game single-handedly, either with a late flurry of maximums - as Yuvraj Singh can testify - or a canny spell of economic bowling.
Having claimed Hampshire's best first-class debut bowling figures of 6-88 against Glamorgan in 1996, Mascarenhas went on to score the first County Championship century at the Rose Bowl against Worcestershire in 2001.
He collected the first Twenty20 hat-trick, against Sussex in 2004, and was a key member of Hampshire's victorious 2005 Cheltenham & Gloucester Trophy side. In 2007, the all-rounder was awarded a benefit year.
A string of glowing references from Shane Warne preceded Mascarenhas' ascent to the international scene, and he featured in both Twenty20 matches and three one-day internationals against West Indies in 2007 before producing his finest moment in an England shirt at The Oval - clearing the ropes with the last five balls of England's innings.
There were sporadic appearances for England's one-day and T20 sides after that, and Mascarenhas became the first England player to join the Indian Premier League when he signed for Rajasthan Royals in 2008.
He was appointed Hampshire captain soon after, but injuries forced him to step aside in 2010 and he missed the county's Friends Provident t20 triumph on home soil that year.
Mascarenhas also missed the 2012 Clydesdale Bank 40 final win with a shoulder injury, but led the side to Friends Life t20 glory - taking 2-20 in the final after his 2-11, which included the crucial wicket of Marcus Trescothick, had seen off Somerset earlier in the day.