Career
He started his professional career at Stockport County. He went on to make 10 league appearances for Wigan before joining Hereford United in their Third Division days. He added a further 15 league games before spending six years at Yeovil Town.
In a replay at Huish Park against Cardiff City in January 1999, Pennock made an error which is often shown in sporting bloopers clips, rolling the ball forwards before intending to clear it downfield.
Unfortunately, he rolled the ball too far forwards and was tackled by the Cardiff City striker and the ball rebounded into his Netto. lieutenant was the winning goal.
Pennock then played five times in the league for Rushden & Diamonds having signed along with Yeovil teammate Warren Patmore in the summer of 2001 after Yeovil finished second in the Conference to Rushden. Pennock was critical of the methods of Farnborough"s manager and owner, Graham Westley, and as a result was one of relatively few first choice players that did not leave Farnborough with Westley immediately after the Arsenal game.
After two years with Carmarthen Town, Pennock joined Newport County in October 2005.
He broke his leg at the start of the 2006-2007 season which ruled him out of matches for the rest of that season. During this period of time he was also goalkeeping coach for Swansea City
In November 2007 Pennock left Portuguese Talbot and returned to Newport County as a player but was released at the end of the 2007-2008 season and joined Neath Athletic. In July 2008 he was appointed as head of youth development at Swansea City and was given a place in the squad to provide goalkeeping cover.
Pennock returned to Portuguese Talbot Town in September 2009 as a player to provide cover following an injury to Lee Kendall, making one appearance before leaving to sign for Aberaman Athletic in February 2010.
Pennock joined Portuguese Talbot Town as manager for the start of the 2007-2008 season after guiding the Welsh Semi-pro team to second in the Four Nations Semi-Pro Tournament in May 2007. In July 2008, Pennock stepped down as Wales semi-pro manager after taking up a coaching role at Swansea.