Is he sticky postflop ? Do you think he can bet his draws when you check back the flop ?

I am not really happy with cbetting that flop, that kind of player won't fold a lot to flop cbets, and we will have to check back turn and call river. Since he seems to be a passive player I am not happy to call if he bets the river,  but not happy to fold.

I think I like checking back the flop with my SD value and try to go there for free.

I don't know why but my comment seemed to delete itself, anyway I think there is some value to cbetting the flop, sure, its thin, but you should take any +ev spot in a cash game you can get, and although a lot of draws will call (meaning you will have to check turn/river and fold), the results from pokerstove speak for themselves:

677,160 games     0.019 secs     35,640,000 games/sec

Board: TcAc8s

Dead:

               equity         win           tie         pots won     pots tied

Hand 0: 54.225%   54.00%    00.23%     363636       1540.00    {9d9s}

Hand 1: 45.775%   45.55%    00.23%     306731       1540.00    {22+, A2s+, K2s+, Q2s+, J2+, T2s+, 94s+, 84s+, 74s+, 64s+, 54s, A2o+, K2o+, Q4o+, J6o+, T7o+, 97o+, 86o+, 76o}

Considering you have over 50% equity in this spot, against a standard 65% calling range, I'm cbetting every time.

Also, I disagree with having to call the river if the opponent bets. Calling stations may like to call a lot with marginal hands, but theyre not altogether keen on betting with them. So if a passive opponent does bet, they're likely to have a better hand than nines, unless the bet is tiny and we get an insane price on it.

OP, your basically putting yourself into difficult situations with Marginal holdings. VIllain in the hand has around 55BB at the start of the hand.  By barreling turn, your basically setting up a PSB on river. And in most situations, Villain is likely Jamming, while you have sacrificed the equity which you could have protected if you checked turn. Im more inclined to take the passive

Check/Check/Check IP line, while maybe value betting 1-street either on turn/ or river.

Cbetting isnt great because=

-you dont know if you are bluffing or vbetting

-Will put you in Turn spots where you dont know what to do

-When you cbetting 99 on  that board you will get called by Ax,10x,8x,KQ,KJ,QJ,J9,97 and f/d

basically you will get called a lot and you have a hand that cant berrel..

check flop,call turn bet(he would prob bet all KQ/QJ/KJ f/d etc on the turn),if he doesnt bet in to you on the turn i prefer betting myself,like half pot,buying yourself a check/back-showdown on the river rather the facing his river bet if that will makes you unconfortable

check river since he will not call with worst and wont fold better....

hmm interesting. I did figure my line was not the best and which is why i decided to post it up to get some insight. Maybe these are spots im loosing money hard to say. I think i agree with most of the statements about taking a passive line on this flop and villain. Check/Check/Check might of been the better play and could of saved me a few extra bucks now that I look at it more closely and take in everyones points and thoughts. Thank you very much everyone. Always nice to have feed back as quickly as everyone did and not waiting 3 days to get a review on a hand you can barely Remember. 

I´d say your betsizes are not well chosen ... you make it way to cheap for Villain to look you up / chase with marginal hands. Would you have bet the same amount (on the flop) with AK?

Looks like the line you took is for value Justin, yet your question is about barrelling the turn.  Which would then flip the concept of what you did into turning your hand into a bluff.

The AT8fd flop is pretty bad flop for our hand (we don't even have bd fd).  All three options don't fit our hand very well: Our hand is a little too strong to chk back and fold to a turn bet, yet very weak to check back and call a turn bet, let alone a 2nd barrel on the river of this wet board.  When we cbet, we are pretty much beat when called, or are up against a draw that has upwards of 42% equity against us.  Not to mention that we are probably not going to check back the turn and pick up bluffs on the river if they choose to C/C flop, end up missing, and then bluffing the river...  The best scenario for us via cbetting is having an 8 call us, and then checking back twice to get to showdown and win.

If you're going to cbet this flop, i would recommend either: not putting another cent in after the cbet, or triple barrelling to try to make your opponent fold all but AJ+.  If you decide to check back, depending on the turn card, its either a call once, or fold immediately scenario.  As played, you're essentially vbetting on the river, and its simply too thin.  Your vbet would be better with JJ, or QT+, which are still thin, but since you're opponent most likely has an 8, T, weak Ace, or missed draw, and the fact that an 8 won't call again very often, you're getting called by better 85%+ of the time on the river...

Up until the river, I thought your betsizing was fine btw.

Nice analysis, Adrian.
My line would definitely have been a check on the flop, and a call on that particular turn.

I'd just check back flop and turn vs this guy.