2017 record: 93-69 (first place; lost in ALDS)
Key additions: After jumping at the opportunity to bring back first baseman Mitch Moreland on a two-year, $13 million contract that proved a bit above market value, the Red Sox waited for the rest of their business. First, it was a two-year deal to bring back utility man Eduardo Núñez. Then it was the best free-agent slugger on the market — J.D. Martinez. After hitting .303 with a 1.066 OPS and 45 home runs in 119 games last year with the Detroit Tigers and Arizona Diamondbacks, Martinez always was the type of player Boston needed to add to its balanced but power-starved lineup without David Ortiz.