Frustrated Richmond defender David Astbury is weighing up future, after being overlooked for selection for much of the season.

The Lions are in desperate need of key backs and the 24-year-old has been on their radar for some time.

Astbury also has a strong relationship with current Brisbane coach and former Richmond assistant coach Justin Leppitsch.

The defender may be an important part of the deal to get Chris Yarran to the Tigers, with Carlton and Richmond yet to agree to terms.

The Blues are demanding Richmond’s first-round pick — presently No.12 — for contracted speedster Yarran.

Carlton has rejected Richmond’s offer of pick 31 for Yarran, but the Lions have 17 — received from West Coast for Jack Redden — and 21. Astbury could move to the Lions in a three way trade that could work out for all three clubs.