The pool of candidates for the Pirates' 2013 starting rotation continued to grow Monday, as did the team's projected opening-day payroll.

Free-agent left-hander Francisco Liriano agreed to new terms with the Pirates, according to a report from Fox Sports, after an injury to Liriano's non-throwing arm disrupted the original contract negotiations.

Liriano and the Pirates were close to agreeing to terms on a two-year, $12.75 million contract in late December, but a broken right arm suffered before Liriano took a physical slowed the process.

Liriano, 29, must pass a physical before the signing is announced. The deal is expected to take some time before becoming official.

According to Fox Sports, Liriano still can make all the money owed him on the original contract if the arm injury does not force him to miss any time in 2013, but if it does, his salary could shrink.

Liriano walked at least five batters per nine innings and had an ERA of more than 5.00 in each of the past two seasons.

The Minnesota Twins removed him from their rotation early in 2012. In 2010, he pitched 1912/3 innings with a 3.62 ERA and struck out 201 batters.

If the deal becomes official, Liriano will join a rotation featuring A.J. Burnett, Wandy Rodriguez, James McDonald and Jeff Karstens.

The signing likely would force Jeff Locke and Kyle McPherson to start the season at Class AAA Indianapolis.

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