Outfielder Josh Lowe back from injury, boosts Rays' lineup.
White Sox pitcher struggles in season debut against Rays.
Steele's return boosts Cubs' pitching depth, fortifying their strong start.
Philadelphia's dominant pitching and potent offense secure a commanding four-game sweep against San Francisco.
Phillies' pitcher extends, sets salary milestone.
Power addition raises questions.
Middle-infield depth bolstered with Tim Anderson's signing
Expert insights on key MLB offseason transactions