$25 - line check with TPGK

Situations like this happen quite regularily when I have TPGK and get called to the river and then being bet at. I am not quite sure if this is a leak in my game when I a) fatten the pot with mediocre holdings like TPGK or b) become weak-tight on the river without a showdown. Villain is 39/5/2 over 100 hands. Should I just check on any street here and see what opp is doing? Would a c/raise give me more info?

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($11.90)
MP ($25.50)
Hero ($40.15)
SB ($15.20)
BB ($17.55)

Preflop: Hero is Button with K, J.
UTG calls $0.25, MP calls $0.25, Hero calls $0.25, SB completes, BB checks.

Flop: ($1.25) 3, T, K (5 players)
SB checks, BB checks, UTG checks, MP checks, Hero bets $1, SB folds, BB folds, UTG calls $1, MP folds.

Turn: ($3.25) 4 (2 players)
UTG checks, Hero bets $1.25, UTG calls $1.25.

River: ($5.75) A (2 players)
UTG bets $2.25, Hero folds.

Final Pot: $8

Bet more on the turn. As played I think you can fold the river. Looks like a value bet with an A.

As Harry said, bet more on the turn, river is read dependent.

Is he capable of playing a call/call/bet line? Is he good or bad?

If he's bad, dump to the bet, if he's good and can make plays like this, you have a decision to make, but, at 25NL, I'm leaning towards the bad player