The Opener: Harrison, Raleigh, Pitchers’ Duel

Here are three things we’ll be keeping an eye on around the baseball world throughout the day today:

1. Harrison to make Red Sox debut:

After being acquired back in June as the centerpiece of the Rafael Devers trade, former top prospect Kyle Harrison has spent the entirety of his Red Sox career so far in Triple-A. That’s set to change later today, as MassLive’s Chris Cotillo writes that Harrison is set to be recalled to the big league roster today. Lefty Chris Murphy will be optioned to the minor leagues in the corresponding move, according to Cotillo.

Fellow young lefty Payton Tolle is listed as the probable starter for today’s game against the Athletics, so it’s possible that Harrison will be ready to piggyback after Tolle threw just three innings in his last start. Another possibility, of course, is that Tolle will be scratched from his start and Harrison will fill in to give Tolle additional rest after a tough outing against the Diamondbacks last week, or even that Harrison is being called up early for a start later this week. The lefty has a career 4.48 ERA across parts of three MLB seasons in San Francisco, and a 3.75 ERA in 12 starts with Triple-A Worcester.

2. Raleigh chases Mantle:

Cal Raleigh is in the midst of a historic season that may well win him the AL MVP award. As the Mariners wrap up their series against the Cardinals later today, he’ll be chasing another exciting piece of history. Raleigh currently has 53 home runs on the season, which puts him just one long ball behind Mickey Mantle for the single-season home run record among switch-hitters and two away from taking sole possession of that record. Cardinals rookie Michael McGreevy, who has a 4.68 ERA in 73 innings of work this year, will be tasked with keeping Raleigh from reaching that milestone today. In 142 games this year, Raleigh has slashed .240/.349/.574 and leads the AL with 113 RBI in addition to his MLB-leading home run total.

3. Pitchers’ Duel in Texas:

The Brewers are looking to avoid a sweep at the hands of the Rangers in Dallas today, and they’ll do so with ace Freddy Peralta on the mound amid a career season. Peralta has pitched to a 2.50 ERA with a 27.1% strikeout rate. On the mound opposite Peralta is a formidable foe, however, as the Rangers will be starting veteran right-hander Merrill Kelly. Kelly has a 3.16 ERA on the year across 29 starts, but he’s been even better since joining the Rangers at the trade deadline. He’s on a five-outing streak…