Tim was named Driver of the Year for 2007 and 2008 by the United States Harness Writers Association. He underwent hip replacement surgery in early December, 2008 for a congenital hip problem, but was back competing by late January 2008. He expected to have the other hip replaced in late 2009.
Tim started driving Standardbreds at a very young age and on November 27, 2007 broke the record of number of wins (1,077) for a single year which was set in 1998 by Walter Case, Junior. Tim drove his 1,078th winner at Dover Downs in Delaware on the way to recording 1,189 wins that year. Tetrick won the 2012 Hambletonian Stakes with his horse Market Share. He won his 8,000th career race in March 2014.
