MLB.com fantasy guru Fred Zinkie fielded questions from fans during a live Twitter chat at @Fantasy411 on Tuesday. Check out the chat transcript below and check out the @Fantasy411 Twitter handle and MLB.com's fantasy home. Questions and answers have been edited for clarity.
Q: @PG3Phil Could Phillies prospect Maikel Franco be the next big name to get a big league call?
Fred Zinkie: Possibly. He is worth a bench spot in NL-only, but not yet in mixed leagues.
Q: @lauriekeiko Keep Marcus Semien or pick up Luis Valbuena? Mixed league 5x5.
Fred Zinkie: Keep Semien.
Q: @mrenz18 @MLB Should I upgrade on Kolten Wong at second base, or stick with him?
Fred Zinkie: Stick with him for now.
Q: @b_lane19 With Addison Russell now up with the Cubs, I have Russell, Chase Utley and Andrelton Simmons for two spots. Who do I part with?
Fred Zinkie: Simmons.
Q: @isiaaah_ Is there anyone worth trading for Nelson Cruz?
Fred Zinkie: Cruz is good, but likely overvalued right now. Don't target him in a trade.
Q: @tigers49round Will Lorenzo Cain continue his hot start or should I sell him now?
Fred Zinkie: Put him on the trade market and see what you can get.
Q: @itsmaverick Does it make sense to hold Rusney Castillo even if he's on the DL with Triple-A Pawtucket?
Fred Zinkie: Yes. He could still make a big impact.
Q: @EstradaLion I'm picking up Carlos Rodon in my keeper league -- drop Homer Bailey or Jimmy Nelson?
Fred Zinkie: If you have enough starters, drop Bailey.
Q: @jamest_19 What should I do with Elvis Andrus? I just picked up Russell and I don't know if I should keep Andrus.
Fred Zinkie: Hold Andrus for now.
Q: @o_Gateway_o Jonathan Lucroy and Yan Gomes are both injured. Drop Jeurys Familia, Rodon or Pedro Alvarez? My pitching is deep.
Fred Zinkie: If it's a non-keeper league, drop Rodon.
Q: @sportsweather Thinking of dropping Carlos Gonzalez for J.D. Martinez. Make sense or hold on to CarGo?
Fred Zinkie: As long as he is healthy, you need to hold CarGo.
Q: @Kevin7Roque Should I drop Jake Lamb and pick up Semien or Luis Valbuena?
Fred Zinkie: Add Semien.
Q: @Rob_M_Wood Should I consider dropping Adam Eaton?
Fred Zinkie: Fine to drop him in a 10-team league. Bench in 12-team.
Q: @rdb313 Who are good under-the-radar hold guys?
Fred Zinkie: Pirates relievers Jared Hughes and Tony Watson.
Q: @Clementos34 @MLB Lucroy replacements? Evan Gattis was just dropped. Best pick?
Fred Zinkie: Pick up Gattis.
Q: @ChandlerK716 Stick with Brian Dozier or try to upgrade?
Fred Zinkie: Stay patient with Dozier, for sure.
Q: @samphelps21 Is it too early to give up on Taijuan Walker?
Fred Zinkie: He can be dropped in shallow leagues.
Q: @Jay_Normous 16-team mixed dynasty. Trying to stash a guy to be called up this year. Byron Buxton, Franco, Miguel Sano, other?
Fred Zinkie: Stash Buxton in dynasty.
Q: @GrassyKnoll34 I have Yasmani Grandal to replace Yan Gomes and Travis d'Arnaud. Was offered Buster Posey for Freddie Freeman. Should I accept?
Fred Zinkie: Yes. Fair deal.
Q: @JustBaseball11 Is Dodgers prospect Corey Seager worth an add? When's his call?
Fred Zinkie: Likely not worth an add in one-year leagues.
Q: @TheHotCorner7 Got offered Adrian Gonzalez for Kris Bryant in a keeper league -- am I over thinking by not accepting?
Fred Zinkie: Stick with Bryant in keeper.
Q: @LivingProper Rest-of-season league, first pick: Devon Travis or Russell?
Fred Zinkie: Russell.
Q: @hillphillydelux Josh Donaldson and Christian Yelich for Adrian Beltre, Carlos Carrasco and Jonathan Papelbon? Also, time to trade Jon Lester?
Fred Zinkie: Beltre side. And keep Lester.
Q: @McGuireGMM Am I safe to drop Jered Weaver yet in a 12-team league? Also, who you like better for the rest of 2015: Billy Butler or Brandon Belt?
Fred Zinkie: Drop. And Butler.
Q: @LivingProper Rodon -- is he worth dropping Carlos Martinez or Drew Pomeranz for?
Fred Zinkie: Not in a one-year league.
Q: @DavisC11 I need to pick up a catcher. Kevin Plawecki, Miguel Montero, Wilson Ramos?
Fred Zinkie: Ramos.
Q: @yankees92389 Rodon for Russell. Who wins?
Fred Zinkie: Russell side in a one-year league.
Fred Zinkie is a senior fantasy baseball writer for MLB.com. Follow him on Twitter at @FredZinkieMLB.