As the baseball winter meetings concluded, two potential blockbusters involving Diamondbacks right fielder Justin Upton were in play, according to a major-league source.
The first involved three teams - Arizona, Texas and Tampa Bay - with Upton going to Texas. The other involved four teams, with Seattle being the fourth.
The Rangers' fervent push for Upton was fueling both potential deals, and may be an indication of the team's confidence in landing free-agent right-hander Zack Greinke, who also is being pursued by the Los Angeles Dodgers.
The arrival of Upton, 25, likely would lead to the departure of free-agent outfielder Josh Hamilton, who likely will be too expensive for the Rangers to keep if they sign Greinke.
The Rangers want to add one top hitter and one top starting pitcher, preferably one through free agency, the other through a trade, sources say.
And the Seattle Mariners, who met with Hamilton, his wife and agents at the winter meetings on Sunday, are poised...