White Sox acquire Jeff Samardzija from A's in six-player deal

The White Sox on Tuesday signaled their intention to contend in 2015, acquiring starting pitcher Jeff Samardzija and minor leaguer pitcher Michael Ynoa from the Oakland Athletics in exchange for infielder Marcus Semien, pitcher Chris Bassitt, catcher Josh Phegley and first baseman Rangel Ravelo.

From a purely baseball perspective, Samardzija is exactly what the Sox need. He's a legitimate No. 2 starter, a right-hander who can be slotted nicely in between ace left-hander Chris Sale and left-hander Jose Quintana in the rotation. One through three, the Sox can now match up with just about everybody in terms of starting pitching.

The downside to this deal from the Sox perspective? Samardzija is entering the last year of his contract. He could be here today, gone tomorrow, and if the Sox don't win in 2015, this deal is a waste.

The good news is the Sox did not include any of their top prospects in this deal. Carlos Rodon, Tim Anderson, Micah Johnson and Francellis Montas are all still in the organization. It would have been a questionable move to give up any of the top young guys for potentially just one year of Samardzija.

The four guys the Sox parted with are all guys you can replace. Semien is an athletic, versatile player with some pop in his bat. However, he was a player without a position. The Sox even had him play some outfield in Triple-A last year just to see how he would react. He projects as a utility player. There are plenty of those around.

Bassitt has a good arm and got a look in the major leagues at the tail end of the 2014 season. The Sox were using him as a starter, but most believe his eventual role will be in the bullpen. An interesting pitcher, sure, but not an untouchable.

The White Sox coaching staff never warmed up to Phegley, primarily because of his defensive limitations. He was not in the organization's plans. Good riddance.

Ravelo is a guy who needed to change organizations. He has some promise as a hitter, but he's a right-handed hitting first baseman. The Sox already have one of the best right-handed hitting first basemen in the game in Jose Abreu. Ravelo is not a candidate to take Abreu's job anytime soon. He was expendable.

The Sox have eroded some of their organizational depth with this trade, but you can live with that if Samardzija pushes you into the playoffs next season.

Here's the key moving forward: The Sox can't stop here. With the addition of Samardzija and closer David Robertson, this is now an 85-win team. That's a huge step forward over last year, but it's still not good enough.

You may have Sale and Samardzija at the top of the rotation for just one year, so general manager Rick Hahn needs to keep pushing and make this team a potential 95-game winner. The time to go for it is right now.

Do something to upgrade left field. There is no more time to be patient with Dayan Viciedo. Add another bullpen pitcher to set Robertson up. Maybe think about a veteran to help at the back end of the rotation. There are mediocre incumbents at catcher, third base and second base. Upgrade at one of those spots, if possible.

The White Sox are close to being a good team, but they aren't quite there yet. Hahn has now put himself in position to get to that point before the offseason is over.