BOSTON — The Tampa Bay Rays carry the American League’s best record at 56-38 into a four-game divisional showdown against the surging Boston Red Sox at Fenway Park, beginning with a split doubleheader Friday and continuing through Sunday’s series finale.

The matchup pits the AL’s top team against its hottest club. Boston has gone 14-3 since June 24, while Tampa Bay posted a 13-5 mark in the same stretch after clawing back from a 9-18 skid between late May and late June. The Rays hold a commanding edge in the season series, having taken two of three at Fenway in May before sweeping a three-game set at Tropicana Field last month.

FanGraphs gives Tampa Bay a 97.7 percent chance to make the postseason and a 55.7 percent chance to win the division. The Rays’ lineup is anchored by three of the league’s best hitters — All-Stars Yandy Díaz and Junior Caminero and 2025 All-Star Jonathan Aranda — along with four strong starters and All-Star closer Bryan Baker. Rays beat reporter Adam Berry noted the club’s biggest vulnerability is lineup depth beyond that trio: “Aside from their ‘Big Three,’ the only hitter on the team with an above-average OPS+ is Ryan Vilade (117 OPS+ in 152 plate appearances).”

The Red Sox (46-48) enter the series riding a wave of momentum after a four-game sweep of the Yankees on their most recent homestand, but Boston’s 17-27 home record remains the worst in the Majors. The club is also 10-17 within the AL East, the worst divisional mark among the division’s five teams. Red Sox beat reporter Ian Browne said Boston faces roster challenges: “Starting pitching has been the strength of the team all year, but two key lefty rotation members (Connelly Early and Ranger Suarez) went on the 15-day injured list recently.” Catcher Willson Contreras, Boston’s best hitter this season, will serve the final game of a five-game suspension in Friday’s doubleheader opener.

Boston’s longer-term concerns center on two injured cornerstones. Lefty ace Garrett Crochet has not pitched since April 25 due to shoulder inflammation and had not resumed throwing as of the All-Star break. Outfielder Roman Anthony suffered a partially torn tendon in his left wrist on May 4 and had not started swinging in the days leading up to the break. Per FanGraphs, the Red Sox have a 40 percent chance to earn a playoff spot but just a 1.6 percent chance of winning the East, sitting 10 games behind Tampa Bay and seven behind the Yankees with 68 games remaining.

The series also carries Trade Deadline implications for both clubs. Rays president of baseball operations Erik Neander is expected to be aggressive as a buyer if the team maintains its position. Browne described the Red Sox as “modest buyers” at this point but cautioned that a slump could reverse that posture, with veterans Sonny Gray and Aroldis Chapman potentially attractive to other contenders.

Tampa Bay faces a demanding stretch ahead: eight games over seven days in Boston and Toronto followed by three home games against Cleveland before the club’s next scheduled off-day.