Taking inventory of the outfield situation...
Every true outfielder on the roster, excepting Johnson, has been around for a while.
Straw, with about a full season of PAs...602...has been worth 3.1 fWAR. His present OPS is right on his career numbers...662....and his def fWAR is 9.9. Anybody would take 3 WAR per season. He is 26.
The intrigue with Harold is puzzling, except that he is fun to watch...a fat kid running so well. Except that it doesn't translate to baseball production. In 708 PAs his fWAR is .07. His 2021 OPS is right on his career number of .721, but his offensive production has been worth less that Straw's. Liability is too kind to describe his defense. He is 26.
Mercado has been worth 1.5 fWAR in 649 PAs. His 2021 OPS is 50 points below his career number of .688. He is a solid defender. He is 26.
Zimmer in 675 PAs has been worth 2.3 fWAR. His 2021 OPS is about 30 points higher than his career .659, but is driven by nine HBPs, which have added about 50 points. His career K rate is 33%, but is much worse this year. He is a plus defender, but not as good as Straw. He is 28. Both he and Mercado are out of options.
None of the above have trended upward over several years, and are no longer young in baseball terms. Their numbers are their numbers. Expecting anything else is foolish.
Johnson is also 26, and outside of a very good stint in Columbus in 2019, powered by a .370 BABIP, has not looked good since being acquired in the Gomes trade. In spite of optimistic reviews of his defense, the eye test of his play in RF...in extremely SSS... does not agree.
Nothing suggests that...outside of Straw...any of these guys are more than a fourth or fifth OF.
For some unfathomable (to me) reason, Jones has not been playing every day in the OF. But even if he did, he does not look close to MLB ready at the plate. Folks talk about his slow start to the season and his heating up now, but slumps count just as much as hot streaks. Overall he has been about average this year, while his K rate has trended up for years, and his production against the norm has trended down.
Amed has the athletic ability to play MIF and the outfield, IF he was ever allowed to play something other than SS on a consisten basis. He has not been a plus producer at the plate, but his ability to play multiple positions would make him more valuable than his overall numbers. His career OPS is .703, and he is just under that this season. That is far better than any outfield option we have, other than Harold, who is a poor hitting DH. At 25, he is the youngest of the bunch.
In 2015, we had a lousy defense, although not nearly as bad as this season. But when Lindor was called up, the defense immediately became above average...immediately.
Once we get past Toronto, Gimenez should be inserted at SS.
Amed should be groomed as the super utility guy. He should play second, and get work in the outfield, esp since he would be far more productive vs lefties than any other OF option we have.
Amed career vs lefties...815 OPS.
Harold....718
Straw....509
Zimmer...593
Mercado...717
Neither Jones nor Johnson have ever shown much ability to hit lefties in the minors.