The upside I see for the Sox is ERod being healthy, Eovaldi proving his stuff will translate over a full year and Devers breaking out. I guess you could also add the catchers position, although it’s not really a breakout if they move from horrendous to below average, but you’ll take it, I’m sure. Pedroia is a wild card and the board has treated him as such which is appropriate
The downside I see is JD and Mookie still being forces of nature but not repeating 2018. This isn’t that hard to follow. JD was a DH and had over 6 WAR. Mookie was out of his mind last year. Both guys could fall back to .900 OPS seasons and be very productive, all star level players. Chris Sale had the best 2/3 of a season he’s ever had. He finished the year looking like a shell of himself with a mystery shoulder injury that sapped his velocity. His downside this year is humongous mostly because of how high he has soared. If he’s just good, that’s a big fall. Eovaldi’s health history needs no introduction, so while he was a trade deadline add and postseason folk hero, he could also be on the shelf. Price’s history of elbow woes hampered him for two seasons. He finished well, clearly, but he’s got some concerns there. Xander has a career season. If he slides back a bit, he’d still be all star caliber. Pearce was out of his mind after the trade, likely not to be repeated. Kimbrel is gone leaving a pen in disarray.
This all adds up to one commonality that I’ll throw out there. The Sox offense will be stacked, still top 3, maybe number 1, but they won’t score as many runs. The rotation, now shored with Eovaldi will be good when the top 5 take the bump, but there will be a fair amount of starts by your #6 and #7 starters. The leads handed to your pen will be slightly smaller than last year and likely earlier than last year, which is going to put a lot of pressure on the underbelly of your club. This is why the Sox are going to finish behind NY. The pen overachieved based on personnel last year. They lost two of their top 4 relievers and added nobody to it. The pen losses will mount. The best way to beat your pythag is to have a dominant pen.