Sources: Red Sox have 5-year deal with J.D.

The prolonged courtship of slugger J.D. Martinez has paid off for the Red Sox, as MLB.com's Jon Paul Morosi reported via sources that the sides have reached agreement on a five-year, $110 million contract that includes opt-outs after the second and third years of the deal.

The new pace of play rules, explained

Here's everything you need to know about the rules changes announced for the 2018 season.

Phillies, Arrieta having discussions

Perhaps the best option remaining on the free-agent pitching market is Jake Arrieta, the 2015 National League Cy Young Award winner.

Padres' bright future attracted Hosmer

Eric Hosmer is officially the newest member of the Padres. One day after finalizing an eight-year, $144 million contract with Hosmer, San Diego introduced him as its cornerstone for the foreseeable future.

Judge, Stanton add ding, zing to first spring BP

Sixty players passed through the runway that leads from the home clubhouse to the dugout at George M. Steinbrenner Field on Monday morning, but all eyes seemed to be locked upon Aaron Judge and Giancarlo Stanton.

Trout drops everything to watch Ohtani hit

Trout drops everything to watch Ohtani hit

5 under-the-radar breakout hitters for 2018

Breakout hitters can come from anywhere. They can be heralded youngsters like Cody Bellinger or Aaron Judge, or they can be late bloomers like Cardinals outfielder Jose Martinez.

Yankees, White Sox top fits for Moustakas

One National League executive said Monday that the Yankees and White Sox have the best chances to land Moustakas, based on current market conditions. The Royals also could re-sign Moustakas, although their front office is prepared to start rebuilding with younger players. Some within the industry see the Cardinals as a fit.

Hall of Famer Cepeda hospitalized in Bay Area

Giants legend and Hall of Famer Orlando Cepeda was rushed to a Bay Area hospital on Monday night.

Hosmer to honor Yordano, wear No. 30 in SD

The memory of his close friend and fallen former teammate, Yordano Ventura, remains embedded in Eric Hosmer. When Ventura was killed in a car accident in his native Dominican Republic in February of last year, the tragedy shook Hosmer and the Royals organization.

Felix, Yadi lead select group in it for long haul

Over the weekend, Eric Hosmer agreed to a big honking eight-year, $144 million contract with the Padres, ending his run with the Royals. Today we look at the longest-tenured active careers with one team, for both pitchers and hitters.

D-backs sign speedy Dyson to 2-year deal

Not long after word began coming out that J.D. Martinez had signed a five-year deal with the Red Sox, so too did the news that the D-backs had agreed to terms with Jarrod Dyson on a two-year contract.

'18 Player Preview: Dominate your fantasy draft

From baseball's brightest stars to the next great fantasy steal lurking on your favorite team's depth chart, everything you need to know is one click away.

Bryce: 'I'm focused on this year,' not free agency

Before he began his first press conference of the spring, Bryce Harper cut off the questions he knew would be coming.

Be a GM with Yahoo Sports Fantasy Baseball

If you're like millions around the country, you're excited for not only Opening Day, but Yahoo Sports Fantasy Baseball, the Official Fantasy Commissioner Game of MLB.com.