The Nationals are closing in on a deal with right-hander Luis Ayala, reports Jon Heyman of CBS Sports (on Twitter). Ayala is represented by Boston Sports Counsel's Daniel Rosquete.

The 36-year-old Ayala posted a 2.90 ERA in 31 innings for the Braves last season after being traded over from the Orioles in the first couple weeks of the season (April 10). With Atlanta, Ayala averaged 5.8 K/9 and 3.8 BB/9 to go along with a strong 59.6 percent ground-ball rate.

Ayala's future in the Majors was in doubt following a brutal stretch from 2009-10. He signed with the Twins heading into the '09 campaign but posted a 4.18 ERA before getting released, and he allowed 10 runs in 7 2/3 innings after being picked up by the Marlins that season. The end result was a 5.63 ERA, and he didn't fare any better in 2010 when he posted a combined 6.42 ERA at the Triple-A level between three different organizations.

Since that pair of difficult seasons, however, Ayala has revitalized his career with a rock-solid 2.58 ERA, 6.1 K/9 and 2.6 BB/9 in 164 innings for the Yankees, Orioles and Braves.