The Boston Red Sox welcome the Seattle Mariners to Fenway Park on Monday, August 31, for a 6:45 PM ET first pitch in what shapes up as a classic late-summer regular season matchup. Payton Tolle gets the ball for Boston opposite George Kirby, one of the more polished arms in the American League. The game airs on NESN locally and WEEI 93.7 FM on the radio dial. September is one day away, the standings are what they are, and every game at this point carries weight. Boston's lineup will need to earn it tonight against a pitcher who rarely gives anything away.

Pitching Matchup: Payton Tolle vs. George Kirby

George Kirby is the story on the mound. The Seattle right-hander has built a reputation as one of the game's better command pitchers — the kind of arm that attacks the zone relentlessly and makes hitters beat themselves. His ability to throw strikes and work deep into games puts pressure on Boston's offense to stay disciplined and work counts. Passive at-bats against Kirby tend to go nowhere fast.

On the other side, Payton Tolle gets the start for the Red Sox. Tolle is a younger arm still carving out his place in a big league rotation, and a home start at Fenway Park against a lineup this capable is a real test. The Mariners bring legitimate offensive threats — Julio Rodríguez batting third, Cal Raleigh fourth, and Randy Arozarena leading off — so Tolle will need to be sharp from the jump.

Boston Red Sox Lineup

• Roman Anthony — DH
• Mickey Gasper — 1B
• Ceddanne Rafaela — CF
• Wilyer Abreu — RF
• Nick Sogard — 2B
• Caleb Durbin — 3B
• Jarren Duran — LF
• Trevor Story — SS
• Connor Wong — C

Seattle Mariners Lineup

• Randy Arozarena — LF
• Dominic Canzone — DH
• Julio Rodríguez — CF
• Cal Raleigh — C
• Josh Naylor — 1B
• Taylor Ward — RF
• Cole Young — 2B
• Weston Wilson — 3B
• J.P. Crawford — SS

Keys to Watch at Fenway Park

Can Boston's Lineup Solve Kirby?

Kirby's calling card is command, and the Red Sox will need patient, aggressive at-bats to knock him around. Roman Anthony leading off is intriguing — the young DH has the plate discipline to make Kirby work. Ceddanne Rafaela hitting third brings athleticism and contact ability. If Wilyer Abreu can get a big swing in the cleanup spot, that changes the complexion of the night in a hurry.

Tolle's Ability to Contain the Seattle Middle of the Order

Julio Rodríguez and Cal Raleigh are legitimate dangers in the heart of Seattle's lineup. Raleigh has power to all fields and punishes pitchers who miss over the plate. Tolle cannot let Rodríguez beat him with anything he can drive. Early command will be the difference between a quality start and a short evening.

The Fenway Factor

Home games at Fenway Park in late August matter to a Boston club playing for standing in the AL. The Green Monster is always in play for left-handed pull hitters, and Seattle's lineup has enough right-handed bats to keep that wall relevant all night. Boston's crowd will be into this one from the first pitch.

Prediction

This one hinges on Tolle. If he can get through five or six innings without a crooked number, Boston's offense — even against Kirby — is capable enough to scratch together runs. The Red Sox lineup has depth and the Fenway crowd gives the home side an edge in close games. Expect a tight, low-scoring affair. Edge: Red Sox 3, Mariners 2.