The move comes after they were told they do not feature in the future plans of England head coach Stuart Lancaster.
Hodgson won 38 England caps over an 11-year international career while Mears represented his country on 41 occasions and made one Test appearance for the British and Irish Lions, against South Africa in 2009.
Lancaster spoke to both players during the summer tour of South Africa and they agreed that England need to blood younger players in their positions, with the 2015 Rugby World Cup in mind.
"Firstly, both Charlie and Lee have been outstanding senior players in the last six months and I cannot thank them enough for the support they have given me and this young squad as we move forward," Lancaster said.
"With 80 caps between them they have a vast amount of experience and that has been invaluable.
"I had chats with both of them in South Africa and our thoughts were not too dissimilar - that if we are building a team for 2015 then, just as we did in January, we have to decide on which players will take us forward and be in the mix in three years' time."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The Barbarians are one of the top invitational rugby sides with a long history and classic rugby jersey.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Lions get ready for their matches with this green training jersey. It's what the players wear. Get in the Gear!
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The Lions are ready to get their Australia tour underway. They arrive in Perth on Monday.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.