Murtagh played for England at the Under-19 World Cup in 2000, where he showed great promise.
Predominantly a seam bowler, he has worked hard on his batting and is turning into a useful lower-order player. In 2004 he provided a couple of rescue acts when Surrey were left needing runs, including a score of 74.
He is quick in the field and patrols the boundary with great success.
He had to lead the attack on several occasions in 2005 after injuries to some of the more senior bowlers, a role he coped with admirably, and he signed a new two-year contract at the end of the season.
Murtagh proved his worth as an accurate seam bowler in Surrey's 2005 Twenty20 campaign, taking 6-24 against Middlesex at Lord's.
He also managed to hit the stumps twice in a quarter-final bowl out against Warwickshire to book Surrey's place at finals day.
He decided to accept a two-year contract from Middlesex starting with the 2007 season and took 37 wickets in 13 championship matches as he established himself as a regular in the side.
Murtagh was easily the county's leading wicket-taker in the one-day competitions with 21 and 17 in the NatWest Pro40 and Friends Provident Trophy respectively.
He enjoyed an even better season in 2008, finishing as the leading wicket-taker across all competitions with 104 scalps. This included the highest tally in Division Two of the LV= County Championship: 64.
He helped the Crusaders win the Twenty20 Cup and played in the inaugural Stanford Super Series in Antigua, going on to take 60 wickets in the championship during Middlesex's poor campaign the following year in 2009. His efforts earned him a new long-term deal.
Having endured a poor season by his high standards in 2010 with only 38 championship wickets, he more than doubled that with 80 the following year to help Middlesex win Division Two.