Update, 2:50 p.m.: The team has officially placed DeRosa on the disabled list and designated Atahualpa Severino for assignment to make room for Izturis on the roster.

(Tom Mihalek/AP)

The Nationals lacked depth in the middle infield with all-star shortstop Ian Desmond sidelined for roughly five weeks with an oblique strain. Desmond has already sat two weeks and could return in late August or early September.

They turned to Izturis, an exceptional fielder and 12-year veteran who has a career .255/.294/.323 slash line. He hit .235 with a .582 OPS over 169 plate appearances for the Brewers this season. He was named an all-star in 2005 with the Dodgers despite finishing that season with a 66 OPS+.

The Nationals will have to clear a spot on their 40-man roster to accommodate Izturis. The best bet to be designated for assignment is Class AAA reliever Atahualpa Severino, who made his major league debut as a call-up last September.

We’ll have more later on the move and possible ramifications.