What could Giants get in return for their prospects at trade deadline?
After thoughtfully improving the Giants minor-league system and financial flexibility during the past 2 years, Farhan Zaidi appears to finally have the means to boost the teams pennant chase before this months trade deadline. The president of baseball operations hasnt shown any interest dealing away 19-year-old sensation Marco Luciano, but there are plenty of other prospects who are valued around the league and could help the Giants upgrade the big-league roster with bullpen help, a starting pitcher and a right-handed bat. Tier I  The uncertainty around Buster Poseys injured left hand could make Joey Bart feel indispensable, but 2020 first-round pick Patrick Bailey appears to be trending toward eventually pushing Bart as the organizations catcher of the future. A trade package that centers around one of either Bart, outfielder Heliot Ramos or outfielder Luis Matos could net the right-handed bat the Giants have been lacking. The lowly Baltimore Orioles or swooning Chicago Cubs could be matches for the Giants, whose problems against left-handed pitchers have been multiplied by injuries to Posey and Evan Longoria and the recent struggles of Mauricio Dubon and Austin Slater. If the Giants can convince the Cubs to give up on the potential of a post-All-Star-break run, Chicago could offer a couple of intriguing options. Willson Contreras, a catcher who can play left field, recently ripped his teammates for a lack of effort, and Kris Bryant, who can play all three outfield positions and the corner infield spots, could have his $19.5 million contract offloaded before he hits free agency. The Orioles have an intriguing possibility in Trey Mancini, a first baseman/outfielder who will turn 30 before he starts his 2022 arbitration-eligible season. Though Mancini might not be part of Baltimores desired youth movement, trading the colon cancer survivor could be a public relations nightmare for the Orioles. Tier II  All expected to be at least two or three years away from contributing to the Giants at the big-league level, it is believed that outfielder Hunter Bishop, left-hander Kyle Harrison and outfielder Alexander Canario could still draw much-needed bullpen help right now. Minnesota is surprisingly middling, and the Twins could part with right-handers Alex Colome or Hansel Robles. Of course, the more fascinating storyline would be if left-hander Taylor Rogers could be reunited with his twin brother, Tyler, at the back end of the Giants bullpen. Baltimore has a couple of historically reliable left-handed relievers in Paul Fry and Tanner Scott, who arent getting to pitch in many high-leverage situations for the 28-win Orioles. A season before hes arbitration eligible, Richard Rodriguez has allowed just one home run in 35  innings as Pittsburghs closer. Tier III  Its possible that one of the players in the middle of the Giants top-30 prospects rankings, such as third baseman Luis Toribio, right-hander Sean Hjelle or middle infielder Will Wilson, could procure rotation depth on the trade market. The prices are expected to be too high for Minnesotas Jose Berrios or Colorados German Marquez, but there are plenty of other decent options for a variety of financial situations. Among those, Kansas Citys Mike Minor and Texas Kyle Gibson are both signed through next season, with Minor finishing a two-year, $18 million deal and Gibson ending a three-year, $28 million deal. Detroits Matthew Boyd will be arbitration eligible after earning $6.5 million this season, and Colorados Jon Gray will be a free agent after making $6 million this year. Youre always going to like having future club control over any player that you trade for  but if the right rental starter is out there, and we feel like the deal makes sense, I dont think thats going to stop us from pushing the button, Zaidi told beat writer Susan Slusser on The Chronicles Giants Splash podcast. Rusty Simmons is a San Francisco Chronicle staff writer. Email: rsimmons@sfchronicle.com Twitter: @Rusty_SFChron