MLB.com fantasy expert Zinkie fielded questions from fans during a live Twitter chat (at @fantasy411) on Monday. Read through the best of the Q&A below. Questions and answers have been edited for clarity.
@puredustt: Should I drop AJ Ramos for Trevor Rosenthal?
Fred Zinkie: For sure. While Ramos should get saves for a couple weeks, Rosenthal has the potential to compile saves for the rest of the season.
Video: McCullers to DL impacts fantasy owners
@3keenan17: Please rank Carlos Gomez, Amed Rosario and Manuel Margot.
Zinkie: Rosario, Margot, Gomez.
@eDurak80: Who's Minnesota's closer moving forward?
Zinkie: There isn't a clear answer at this point, but Taylor Rogers is my pick.
@tjbenton14: Would you rather own Sean Doolittle or Shane Greene?
Zinkie: I will take my chances with Doolittle. I believe he can hold off Brandon Kintzler.
Video: Kintzler to Nats has fantasy implications
@kbatista15: Would you trade Marwin Gonzalez for Yu Darvish?
Zinkie: Definitely. Darvish could be very effective with the Dodgers.
@Summerville93: Do you prefer Doolittle or Brad Hand?
Zinkie: Hand is my pick. He could be a great closer for the rest of the season.
@juliantharmsen: Would you rather own Derek Fisher or Lewis Brinson?
Video: Amed Rosario could make instant fantasy impact
Zinkie: I will take Fisher, who has more upside due to his supporting cast.
@DJBDynasty: Do you prefer Gerrit Cole or Marcus Stroman?
Zinkie: I will take Cole. Stroman doesn't produce low ratios, and I worry about his run support down the stretch.
@mheaps31: Should I drop one of Ian Kinsler, Rougned Odor, Jean Segura, Paul DeJong or Trevor Story for Rosario in roto league?
Zinkie: You should definitely add Rosario. Story is the player I would drop.
Video: Liriano, Aoki trade impact fantasy teams
@ds_1285: Would you rather own Rosario or Rafael Devers for the rest of the season?
Zinkie: I'll take Rosario, but Devers should still be quite valuable.
@NotoriousBeefy: Brad Peacock is available in my league. Should I drop Dan Straily or Mike Clevinger for him?
Zinkie: Drop Clevinger for Peacock. Peacock should be owned in almost all leagues while Lance McCullers Jr. is on the disabled list.
@tahamufti1: How would you prioritize these injured players in terms of the importance of stashing them on your DL: Ian Desmond, Avisail Garcia, Matt Kemp?
Zinkie: Kemp, Desmond, Garcia. I'm fine with letting go of Garcia in most mixed leagues.
Video: Zinkie discusses the impact of Sonny Gray to Yankees
@420gobills: Is Jim Johnson out as the Braves' closer?
Zinkie: Not yet, but Johnson owners should stash Arodys Vizcaino right away.
@cameron_lit29: Can I drop Todd Frazier for Alex Bregman? Also, can I drop David Price?
Zinkie: Definitely drop Frazier for Bregman, who hit .329 in July. Also, Price can be dropped in 10-team leagues.
@NAT_1776: Is it time to drop Jose Bautista and Mark Trumbo?
Zinkie: Both can be dropped in 10-team leagues.
Video: The fantasy impact of Lucroy heading to the Rockies
@TU_1834: Which player should I keep in my DL slot out of Noah Syndergaard, Trumbo, Stephen Strasburg, Desmond and Dustin Pedroia?
Zinkie: You should keep Strasburg. I would also consider using a bench spot on Syndergaard.
@DN1CE23: Ian Happ seems to be playing less since Ben Zobrist returned to the roster. Should I drop him for Bradley Zimmer or Derek Fisher?
Zinkie: You can drop him for Zimmer, who is emerging as a five-category contributor.
@stiggysmalls: Should I drop Domingo Santana for Fisher?
Zinkie: While Fisher is set for an expanded role, he is not yet more valuable than Santana. Santana has been quite productive this year.
@MarkyMalz: Please share your thoughts on Steven Matz?
Zinkie: We may not see Matz back in his peak form until 2018. You can drop him in a 10-team league. Bench him in deeper formats.
Video: Zinkie on Cabrera getting traded to the Royals
@azito23: Is Ramos still worth holding onto?
Zinkie: Yes, you might as well get a handful of saves from Ramos before Jeurys Familia returns.
@puredustt: Which two relievers should I use out of Kintzler, Ramos and Rosenthal?
Zinkie: Definitely use Rosenthal. Ramos is my second choice, but you may need a new option later this month.
@Sonny_Crockett6: Would you drop David Peralta for Dominic Smith in a 16-team redraft league?
Zinkie: No. While owning Smith is exciting, you are better off with the stable production from Peralta in a deep league.
Zinkie is the lead fantasy baseball writer for MLB.com. Follow him on Twitter at @FredZinkieMLB.