Injury Help Please

Hello all. I am entering the Semi finals of my big money fantasy Baseball league. If I win this week I am guarenteed my $100 back plus some so I need this very bad. A grand prize of roughly $1000 would do a college kid like me well. Tulowitzki and Cargo as well as Mike Stanton, Ryan Howard and a few of my pitchers like Josh Beckett and Yovani Gallardo have really carried my team. Luckily all my pitching matchups are decent this week however my opponent has Justin Verlander going twice, once against the White Sox and the other against Oakland which will kill me. Also Tulo, Cargo, Stanton and Becket are all hurt. It looks like Cargo is returning tomorrow. Tulo may be out all week and Stanton I have no clue about. Becket, I believe is returnign sometime this week. Anyways I am in the process of acquiring Rickie Weeks via the wavers while giving up Corey Hart who I have had filling in for Stanton. Cargo and Justin Upton occupy the other OF spots. Ryan Howard is at 1B with Eric Hosmer as my utility. Miguel Montero is my catcher and Danny Espinosa is my 2b. Here comes the big question. If Tulo has Burstidus like reported and is out all week do I drop Espinosa (this is if I land Weeks I will know by tomorrow) and add a SS to replace Tulo and let the possibilty of Stanton being out and an absence of an OF? The possibly SS are Emilio Bonoficio, Yuniesky Betencourt and Alcides Escobar or even Cliff Pennington. Or do I let Tulo sit as my starter and cary an extra OF on my bench in case Stanton or Cargo are hurt? I can only cary 1 bench position player because I am maxed out on Starting Pitchers and play 4 closers every night. Those closers are Jose Valverde, Leo Nunez, Jordan Walden and Andrew Bailey. Also, if it comes down to Saturday and Sunday and the game is close I may drop one of my Starting Pitchers for another just for a start. We get 3 acquistions per week and my opponent has already excercised 2 of them so he won't be able to do this down the line unless he holds off all this week which he probably won't because he has a cycle of pitchers that he add drops from every week depending on starts. If I did have to do this I was thinking about Drew Pomeranz from the Rockies on Saturday who takes on Madison Bumgartdner of the Giants. The question is which picter do I risk dropping and not retaining? Justin Masterson? Chris Carpenter? Derrick Holland? What do you guys think? Please let me know. I really need this money and have been working real hard with my league that finished 2nd overall with 16 wins. I won my 2 vs 7 matchup by 100 points last week and the number 1 in my league was almost upset by the number 8... he only won by 6 points. I am playing the number 3 this week and this guy won our league last year. I must beat him. Any help is greatly appreciated. Thanks!