White Sox aim to boost rotation

The White Sox, frustrated by their inability to acquire Nationals first baseman Adam Dunn, instead are on the verge of ending up with one of the Nationals’ leading targets: Diamondbacks right-hander Edwin Jackson.

The Sox are in serious discussions about a trade in which they would obtain Jackson for rookie right-hander Daniel Hudson and a prospect, according to major-league sources.

The trade of Jackson would be the Diamondbacks’ second major move in a week. On Monday the team sent ace right-hander Dan Haren to the Angels for left-hander Joe Saunders and three younger pitchers. Additional trades by the D-Backs are likely before the non-waiver deadline Saturday at 4 p.m. ET.

While the White Sox coveted Dunn, they shifted their focus to a starting pitcher after growing discouraged about their chances of completing a trade with the Nationals, sources say.

The Sox need for another starting pitcher arose after right-hander Jake Peavy was lost for the season with a shoulder injury. Hudson, who replaced Peavy, has a 6.32 ERA in three starts and is next scheduled to pitch Friday night against the A’s.

Jackson threw a no-hitter against the Rays on June 25, but issued eight walks and overall is 6-10 with a 5.16 ERA. Still, he enjoyed decent success pitching in the AL Central for the Tigers last season, going 13-9 with a 3.62 ERA, albeit in a more pitcher-friendly home park than Chicago’s U.S. Cellular Field.

The Nationals also wanted Jackson, and they completed a trade Thursday night, sending closer Matt Capps to the Twins in a deal for catcher Wilson Ramos. A secondary motivation for the deal might have been to clear 2011 payroll for the addition of a pitcher such as Jackson.

Capps, earning $3.5 million this season, stands to gain a significant raise in his final year of arbitration. Jackson is owed approximately $1.4 million for the rest of this season and under contract for $8.35 million next season.