The D-backs announced on Wednesday that they've signed left-hander T.J. McFarland to a one-year contract, reaching a deal with their last remaining arbitration-eligible player. A source told MLB.com's Mark Feinsand that the deal is worth $1.4 million in 2019 and includes a $1.85 million option for '20 with a $50,000 buyout, meaning McFarland is guaranteed to receive $1.45 million. The club has not confirmed the terms of the deal.

The 29-year-old last year pitched to a career-best 2.00 ERA across 72 innings in 47 outings, while also posting personal benchmarks in WHIP (1.19), fewest runs (18), opponent average (.239), opponent OBP (.296), opponent SLG (.336) and opponent OPS (.631), proving to be one of the National League's more reliable relievers.

This is the first season in McFarland's career that he is eligible for arbitration. Wednesday's agreement will avoid a hearing to determine his salary.

McFarland proved particularly effective against left-handed hitters, holding them to a .165 average with two walks and 22 strikeouts, including a .155 mark over his final 24 games. He was one of just nine southpaw relievers who didn't allow a homer to a lefty. Teammate Andrew Chafin was another.

McFarland was also deployed in long-relief situations, having pitched four or more innings four times, which was the highest in the NL. He tied the Mets' Robert Gsellman and the Pirates' Tyler Glasnow with 21 outings of one inning or more, which was fourth-most among NL relievers. His 2.00 ERA was seventh-lowest among all relievers.

Before joining the D-backs in 2017, McFarland spent parts of four seasons with the Orioles. He was selected in the fourth round of the 2007 Draft by the Indians.