The Mariners are cornering the market on right-handed pitchers named Luis Castillo. Seattle reached a Minor League deal with 29-year-old Luis Felipe Castillo on Tuesday, a source told MLB.com’s Mark Feinsand.

Former Detroit Tigers right-hander Luis Castillo has signed a minor-league deal with the Seattle Mariners. Luis Felipe Castillo, who turns 30 in March, will be a spring training teammate of the far-better-known Luis Miguel Castillo,

The Seattle Mariners' 2025 roster needs more offense to compete for a postseason berth. Could Toronto Blue Jays shortstop Bo Bichette be a realistic target?

There's also been plenty of chatter around the Mariners possibly trading starting pitcher Luis Castillo in order to free up money, but the bottom line is this: The M's can't trade

In December, following the trade for All-Star outfielder Kyle Tucker, the Cubs were linked to Seattle Mariners pitcher Luis Castillo and free-agent starter Roki Sasaki. However, S

Japanese pitching sensation Roki Sasaki officially announced that he would be signing with the Los Angeles Dodgers this winter. He'll join a star-studded roster, complete with Shohei Ohtani, Yoshinobu Yamamoto,

The San Francisco Giants have invested heavily into Matt Chapman being both a leader on the field and off of it, and early returns so far have been great. In sp

The Toronto Blue Jays couldn't land Roki Sasaki in the end, but Ross Atkins still has plenty of options to improve his pitching rotation.

This offseason has been nothing short of a nightmare for San Diego Padres fans. The Friar Faithful, accustomed to the team’s aggressive pursuit of stars, now face an unsettling shift in strategy.

The Athletic's Ken Rosenthal writes that one of the reasons the free-agent market remains clogged in late January is that names like San Diego Padres right-handers Dylan Cease and Michael King are among the starting pitchers available on the trade market.

It seems like just a matter of time before the Cubs sign a name-brand reliever. Estévez is on their radar, according to Jon Morosi of MLB Network. So are Jansen, Robertson and Ryan Pressly, per Sahadev Sharma and Patrick Mooney of The Athletic.

At least 8 MLB teams can and should be doing more to push back against the Dodgers' domination in free agency.