the stats say it all about both Mason and Jeffries. plenty more of the 2011 raw stats on the superleague site, I have standardised them by making them errors per game played this season, and missed tackles as a % of tackles made. Mason has high in the go forward stats, so even if he doesnt look as if hes enthusiastic, he would strengthen the side, Jeffries stats v Briggs are a lot more solid and would provide Herbert - who is high in the tackles per game - with a regular partner. Sorry some of hte stats have indented, but you should be able to read it.
not come out as clear as I wold like, errors/game is first stat eg Mason 0.3, second stat is % tackles missed eg Whitehead 12. % tackle
errors missed
Mason 0.3 8
Whitehead 1.5 12
olbison 0.1 13
Elima 1.2 4
Sibbit 0.1 5
langley 0 5
Donaldson 0.5 7
Addy 1 10
Bateman 1 0
Scrutton 0.3 5
Lynch 0.7 1
Kopzak 0.8 6
Hargreaves 0.5 4
Burgess 0.8 10
Crossley 0 10
Diskin 0.5 5
L'Estrange 1.1 10
O'Brien 0 11
Herbert 2.1 10
Walker 0.9 12
Platt 0.7 12
Sykes 1.2 19
Royston 0.6 14
Kearney 1.4 36
Ah Van 1.1 23
Ainscough 0.6 22
Raynor 0.8 14
Briggs 4 36
Jeffries 0.2 11