I would sit tight right now. I've been backing Hosmer all year and I'm going to continure to do just that. All signs are pointing to Hosmer just being the recipient of some really bad luck. The balls just haven't been falling in for him so far this season, but his contact and line drive rates are right around where they were last year and his K:BB ratio is very good. Sooner or later those hits have to start falling in and with the hot/humid summer days arriving with greater frequency now those long fly balls to the warning track should start finding the seats instead. I still think Hosmer will have a big 2nd half.
Morse is someone to keep an eye on for sure, but he's the 3rd option here for me. The guy has definitely been heating up lately and he's starting to find his power stroke, but we're not going to see a repeat of .910, 31 HR, and 95 RBIs. If he really heats up in the 2nd half then maybe we can expect .680, 20+ HRs, and 70+ RBIs...but that's a big maybe imo.
Rizzo is the wild card and he's my 2nd choice in this group simly because he has been killing the ball all year and I'm thinking this call up will be a success since the last one was such a disaster. The Cubs have almost everything riding on this kid and that he will be a star in the majors. So many things have gone the wrong way for the Cubs thatI think this kid is going to be the great equalizer. I think fate and the law of averages are on his side. I think that he could be capable of producing numbers that are slightly ahead of where Morse finishes. If he really gets on a tear and makes the proper adjustments once big league pitchers make their adjustments to him, then he could easily exceed those numbers.
The most important thing you have to do now is just sit back and watch, lol. I'd keep a very close eye on Rizzo and watch every AB if you can so you can get an early feel for how he's fairing before his 2 or 3 HRs hit Sports Center. If you wait to watch and see what he does on the highlights then you'll miss the boat with him because everybody that knows anything about fantasy baseball will be watching this kid closely and they'll be ready to pull the trigger at a moments notice. Not to fear though, if you miss out on a Rizzo explosion then you have your backup plan in Morse. Less people will be paying close attention to a hitter that has been struggling all year on a Nationals team that doesn't get a whole lot of "national" attention. You should be able to safely watch his progress without the same worries of another owner swooping in and grabbing him first like Rizzo. And if all else fails, you already have Hosmer...and he will hopefully turn his season around and make players like Morse and Rizzo seem like an after thought. Good luck, hope this helps.
"Baseball is ninety percent mental. The other half is physical." --Yogi Berra