The 34-year-old defender had been offered the dual role by Clarets manager Owen Coyle after his initial one-year deal expired this summer.

However, the former Everton and England defender has expressed a desire to extend his playing career and becomes a free agent from July 1.

Coyle said: "David still wanted to play at the highest level possible and I fully understand that.

"However, we cannot guarantee him a first team place at Burnley and we made that clear.

"There was an offer on the table that would have meant David taking a significant hit financially, but equally would have given him the opportunity to move into coaching.

"However, after having a chat we have amicably decided on a parting of the ways.

Coyle added: "I am genuinely sorry to see David go.

"He is a true professional and a really good guy and he leaves with all our best wishes."

Unsworth made 31 appearances for the Clarets following his arrival on a free transfer from Wigan Athletic.

His one goal for the club came in the 1-1 draw with Leicester City at Turf Moor in November, 2007.

Off the field, Chorley-born Unsworth made many more friends after donating £1,000 from his own pocket to boost an appeal for Chorley schoolgirl Jessica Knight, who was stabbed repeatedly in an unprovoked attack in a park in the town.