eman7400, you've got quite a collection of Reds going there, the 1939, 1949 and 1959 versions. Only the 1929 Tigers keep you from a Red sweep. Let's take a look at some dagger options ...
Catcher: A handful of similar enough guys here and many ways to combine them. I can't hurt you here.
1B: This gets interesting. Whitey Lockman is your only cheap option, a 299K player. Otherwise it's big bats in Frank Robinson, Dale Alexander, and Frank McCormick, along with a shockingly impotent Ted Kluszewski with only 8 HR. Now Robinson has ratings in the OF, though his range is quite poor, but you could take him as a second 1B and play him out there if I dagger Lockman. This also ensures you spend a lot of money at 1B. A strong option.
2B: The Mechanical Man gives you a great offensive option here, and Lenny Frey brings a solid bat and an outstanding glove. Neither is too cheap, but there's no reason to take one of them away from you. You've got choices.
3B: Here's another situation with limited players on your list, just 5 of them again. You'll have to spend at least $1.4M on your backup, but with another $1.7M option, there's no reason to dagger either of them. And the three other guys are really similar, so I can't see how a dagger really hurts.
SS: The Tigers give you a 520K player in the fabulously named Yats Wuestling as well as a $1.2M option. So I could force you to spend an extra 700K if I take Yats off the table. It even comes with a perfect line, "Yat's All, Folks." Otherwise, you've got a couple ways you could go here and none of the remaining guys strike me as a great dagger.
OF: You have plenty of ways to configure a solid outfield, so I don't see a dagger that causes you too much pain.
SP: By far your best option is $11.8M Bucky Walters, with 336 IP at 2.47 ERC#. In fact you have only 4 possible pitchers with ERC# under 3.43, and that's not so ideal. Bucky's gonna cost you something on offense to roster, but unless you really want to go into the season with a marginal staff you kinda have to get him on there. He's got to be a dagger option, even if it could just lead you to go all-in on offense. The Tigers only have one pitcher remotely good in George Uhle, so he's an interesting dagger possibility, too.
RP: With 161 innings, Junior Thompson hardly looks like a reliever. But with under 4 IP/G, that's what he really needs to be unless he's in a tandem. But you hardly have any good tandem candidates, nor anyone else who looks useful in the bullpen. You'd be hard-pressed to replace him out there. So he's a candidate, too.
Verdict: I've tried building your roster taking away some of these guys, and nothing totally handcuffs you or forces you to waste a ton of cash. So I'm going to go with the old standby of daggering the best pitcher on your roster. Say goodbye to Bucky Walters. It gives you a lot of ways to bolster the offense without paying his salary, but you also are going to have a much weaker pitching staff without him. I could see some scenarios where you weren't planning to use him and maybe I'm not hurting you at all. But it feels like the right move.
Ballpark: This is an interesting scenario, because you have only two parks to pick from and I basically get to decide which one you use. Navin Stadium has +2 for homers and depresses doubles. Crosley is just +1 for homers and slightly favors pitchers. Well, you don't have many guys at all who can hit homers and quite a few who hit doubles. Plus, your pitching staff isn't going to be very good. So let's put them in Navin, which doesn't help your hitters and hurts your pitchers. Dagger goes to Crosley Field.