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Olney: Javy Baez should join the extension party, and he's not alone

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Baez would love to stay with Cubs for entire career (2:28)

Javier Baez catches up with Alex Rodriguez about his passion for baseball, his desire to help Puerto Rico and how he plans to further improve his game. (2:28)

CHICAGO -- Matt Carpenter has a great thing going with the St. Louis Cardinals, as the patient, salsa-making infielder who has a World Series ring from 2011 and once mashed a series-changing hit against Clayton Kershaw.

A lot of the extensions agreed to by players this spring have seemingly been driven by anxiety, leading to many team-friendly deals. But Carpenter's two-year, $37 million amendment to a contract that was set to expire after this year is a case of a veteran exercising emotional leverage. As one of the most prominent members of one of the most storied franchises in baseball, Carpenter is probably worth more to the Cardinals than to any other team, so it was smart business for him to work this out last month.

And for teams, the extensions are good business because of the cost certainty. As some agents noted in recent weeks, some clubs with larger budgets might tend to be more aggressive in locking up their own players to long-term deals in the months ahead, now that some of their big-ticket costs are settled.

Some other players who might be well-served to work out extensions: