Acquired in the offseason deal that sent Trevor Cahill to Arizona, Parker joins the big league club after starting the year 1-0 with a 2.18 ERA and 21 strikeouts in four starts with Triple-A Sacramento. Parker, who made one start with Arizona in 2011, grabbed the attention of manager Bob Melvin during an impressive showing in Spring Training.
"He's got great stuff," Melvin said. "Of all the guys we've acquired, we feel like he has as high of a ceiling as [anyone]. He's got three, and potentially four, plus pitches. It's all about throwing the ball over the plate for him. He's done that in all of his starts in Sacramento and has earned the promotion up here."
Parker's Oakland debut comes with further significance, as he faces the team he rooted for while growing up in Fort Wayne, Ind.
"I think it was kind of a blessing to be able to go to Sacramento and work with those guys," said Parker. "They've been great to me. ... [I've been] able to hone in on some things and [get as] ready as I [could] when I got the call. It was just about repeating my delivery.
"I'm pretty excited. Obviously, it's something I've been looking forward to all year. So I'm just going to do what I've been doing."
Parker will share the rubber with Chris Sale, who will be making only his fourth career big league start. So far, starting has agreed with the third-year southpaw, after he spent the bulk of 2010 and all of '11 in the White Sox bullpen.
Sale (2-1, 3.50 ERA) picked up the victory in his previous outing by limiting the Mariners to three runs over 6 1/3 innings with 11 strikeouts. Sale hasn't allowed more than three runs in any of his three starts, racking up 21 strikeouts along the way.
Sale will look to continue the White Sox early-season momentum. Though their four-game winning streak was snapped on Tuesday, Chicago has so far shown a chemistry on the mound and in the field -- despite some noteworthy turnover during the offseason.
"Early on in Spring Training, we were all getting used to each other -- a new year and everything else. Toward the latter part of the spring, they started feeling it," said White Sox manager Robin Ventura. "It's just something that happens. It's how they care about it, each other, and the work they do and what they feel during a game. You hope it can always be like that, and you try to ride that out as long as you can -- because it's a long season."
White Sox: Rios' hitting streak snapped
Alex Rios saw his 11-game hitting streak come to an end on Tuesday. The right fielder had possessed the second-longest hit streak in the American League, behind Derek Jeter's 14-game streak. Rios had recorded back-to-back three-hit games and 10 hits in his previous five games before he was blanked on Tuesday. Rios is hitting .340 in April.
Athletics: Leaning on their pitching
Oakland has scored an AL-worst 54 runs this season. The lack of production has forced the A's pitching to pick up the slack, which it has. Oakland's staff possesses a 2.83 ERA, despite striking out just 99 batters so far this season. The starters have kept pace with the bullpen, allowing just 40 earned runs over 131 innings, good for a 2.74 ERA.
Coco Crisp has stolen 25 consecutive bases without being thrown out. It is the longest streak of his career and matches the fourth-longest streak in A's history.
Paul Konerko has homered in two of his last four games, and remains one roundtripper away from 400 career home runs. With 392 home runs with the White Sox, he trails only Frank Thomas (448) for the club record.