Am I the worst hand reader 400 NL ?

[docnuclear]

He just got here 2 hands ago. I'm 21/17/3 if he datamines.

Full Tilt Poker, $2/$4 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

BB: $398
UTG: $854.25
MP: $432.10
CO: $457.65
Hero (BTN): $428.70
SB: $413.60

Pre-Flop: J[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/heart.gif[/img]
3 folds, <font color="red">Hero raises to $14</font>, SB calls $12, BB folds
I assume he is a standard tag unless proven otherwise so when he calls pf I put him an a mid-PP.

Flop: ($32) 8[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $20</font>, SB calls $20

I put him on a K like KQs or a PP between 55 and TT.
Turn: ($72) 2[img]/images/graemlins/diamond.gif[/img] (2 Players)
SB checks, Hero checks

River: ($72) 2[img]/images/graemlins/heart.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $65</font>, <font color="red">SB raises to $202</font>.

When he checks I do not put him on a K, I think an 8 or a K would bet river in case I check behind since I really could have nothing here.
But tags do not ch raise river very often so it gas got to be an 8 right ???