When you're gunning for a championship, a roster is never perfect.

And in the case of the New York Yankees, chasing their 28th World Series title, the quest to be the best is never over. With the Yankees still looking to retool themselves, particularly in regards to getting a new starting pitcher, look for New York to start looking at wheeling and dealing around the July 31 trade deadline.

The Yankees are certainly no strangers to pulling off big midseason trades designed to get them into contention for the postseason. In 1995, the Yankees pulled off a pivotal trade that brought over ace pitcher David Cone from Toronto, a trade that helped Cone and the Yankees win four World Series titles over the next four years. In 1996, the Yankees followed that up by trading for superstar slugger Cecil Fielder, who was instrumental in New York's championship run that season. And in 2000, the Bronx Bombers swapped Ricky Ledee and Jake Westbrook in exchange for multi-time All-Star David Justice, who helped power the Yankees to their third straight world title later that October. And with the legendary Derek Jeter's retirement looming on the horizon, don't expect the Yankees to get gun shy about pulling off a major midseason trade.

While there are plenty of stars that could be had this midseason, especially if the Philadelphia Phillies are looking to clean house on their aging roster, that would also mean that the Yankees would have to part with some key roster pieces; that's just the cost of doing business at the deadline. However, with the chance to snag potential free agents like Cliff Lee and Jeff Samardzija by August in time for a late-season push, don't be surprised to see the Yankees willing to ship off players. Let's take a look at some of the possible candidates that could find themselves leaving the Big Apple by August.

Dellin Betances

So far, the word is that the Yanks aren't looking to trade their latest bullpen stud, who has been solid with a 1.48 ERA and 51 strikeouts this season. However, while bullpen help is critical for any championship team, the Yankees have built the core of their last World Series-winning squads around powerful starting pitching. If the chance to get a legitimate ace comes around, would they be willing to change their tune?

Michael Pineda

For the Dominican right-handed pitcher, this season hasn't exactly gone off smoothly. Between the infamous "pine tar" incident and his battling rib injuries, he's gotten off to a rough start. However, he's 25 and has plenty of potential, which means he could be of great value out of the bullpen for a team looking for relief help. If the Yankees are looking for attractive trading chips to package together, Pineda would be a great place to start.

Bryan Mitchell

He can be a tad on the inconsistent side. But at age 23, he's also young and talented, and in time, he could develop into a well-honed MLB pitcher. The problem is the Yankees may not have the time to wait on Mitchell to turn into whatever it is that he's going to end up becoming, so don't be surprised to see Mitchell offered up in a trade bargain.

Adam Warren

The Yankees' bullpen has gotten quite a bit of help from Warren, who has pitched for 30.2 innings so far this season and thrown 29 strikeouts and given up only 6 earned runs. He may not be the great Mariano Rivera, but Warren's been as close to lockdown as you can get for a reliever. And that makes him quite valuable for the Yankees, especially if they are looking for eye-catching pieces to dangle as trade bait.

Gary Sanchez

At 21 years old, the Dominican Republic-born catcher Sanchez is one of baseball's hottest prospects. This season, Sanchez is batting .251 with six homers and 30 RBIS in 44 games for AA Trenton. A young slugger packed with power, he has the makings of an impact player once he shapes up his defensive skills. One of the lone diamonds in the wasteland that is New York's farm system, Sanchez might be on the trading block if the Yankees want to get an impact player by August.