Nieve, 28, was released by the Pirates just two days ago after allowing 17 hits in just 7 1/3 Spring Training innings. Last year for the Mets, he posted a 6.00 ERA, 8.1 K/9, 4.7 BB/9, 2.1 HR/9, and 37% groundball rate in 42 innings. 18.5% of his flyballs left the yard, a rate that led all of MLB among those with at least 40 innings. Nieve also made eight starts in Triple-A, posting a 5.63 ERA. Pittsburgh signed him to a minor league pact back in December.
The Astros originally signed Nieve out of Venezuela back in 1999, and five years ago he was their third-best prospect according to Baseball America.