Before the start of the 2006 season, he suffered a freak accident, cutting his left wrist whilst trying to open a window, and severing the tendons.

[5] After recovering from this injury, he failed to regain a regular place in the Essex side, and left the county by mutual consent in August 2006.

[7] In January 2007, he was selected for the England A team to tour Bangladesh in February and March.

[8][9] Jefferson had his contract terminated by Nottinghamshire in September 2009 after a run of poor form stretching back two years.

However, he marked a return to form by scoring 112 in the first match of the 2011 county season, and his finest moment for Leicestershire was probably to secure their place in the T20 Final that year by smashing three boundaries in the "super over" needed, after their semi-final against Lancashire ended in a tie.