BOOKMAKERS have reacted toJobe Watson's collarbone injury, with the Essendon skipper drifting from $7 to$26 with TAB to win back-to-back Brownlow Medals. 

Watson was secondfavourite for the medal behind Gold Coast star Gary Ablett, but he has fallento the sixth line of betting following news he would miss at least fourmatches. 

The three-time clubchampion was injured early in the Bombers' 30-point win over Port Adelaide,ruling him out of Brownlow Medal voting for at least five matches. 

The big mover in round 15was Adelaide powerhouse Patrick Dangerfield, who is now outright secondfavourite, in from $10 to $7. 

Ablett firmed from $2.25to $1.90 before being a late omission against the Brisbane Lions, and heremains at $2 following the setback for Watson. 

The race for this year'spremiership has tightened in betting markets following Geelong's win over Hawthorn on Saturday night, which continued the Kennett curse.   

The Hawks, who remain flagfavourites, drifted from $3 to $3.25, while the Cats moved in from $4.50 to$3.75. 

Collingwood ($17 to $11)and West Coast ($67 to $51) were the biggest movers in the premiership market. 

The battle to secure aspot in the top eight remains open, with North Melbourne moving from $10 twoweeks ago into $2.50 following wins over Greater Western Sydney and Richmond. 

Richmond ($1.04) andCollingwood ($1.05) are seen as strong chances to stay in the top eight, whileWest Coast ($1.50) and Port Adelaide ($1.90) and Carlton ($2.25) battle foreighth spot.