Roque Santa Cruz - scored a hat trick for Blackburn on the 15th of December 2007 as the lost 5-3 to Wigan (Marcus Bent scored a hat trick in the game as well, for Wigan)
Jamie Redknapp scored the winner for Liverpool that day.
Mark Hughes, when they lost 2-1 at Sheff Utd on 15 Aug 92.
A few years ago, it was kevin kilbane, but now I'm not too sure
In the 2012 Olympic Semifinals Christine Sinclair, captain of the Canadian WNT scored a hat trick (they still lost though).
It was in March 2009 they lost to Liverpool and Fulham.
Dwight Yorke & Roque Santa Cruz
Arsenal has won the English premier League 13 times. Their most notable title win was in the 03-04 season when they never lost a single match in the league.
Stephen Hunt (Republic of Ireland, Hull City) scored the first goal of the 2009-10 English Premier League season against Chelsea on August 15th, 2009 in the 28th minute.Hull City lost the match 2-1.
I think it was 2006-07 in the premier league, liverpool lost 1-0.