Wolf (first start): Wolf (6-foot, 180 pounds) is the latest member of the Rangers' pitching staff to be recalled from Triple-A Round Rock to make an emergency start for Nick Tepesch, scratched because of a blister on the middle finger of his pitching hand. In six starts at Round Rock, Wolf was 1-1 with a 1.85 ERA. Wolf, 30, last pitched in the majors for Oakland in 2010. He appeared in 11 games in relief, had no record and an ERA of 4.26. For the Miami Marlins in 2007, Wolf made 14 relief appearances going 0-1 with an 11.68 ERA. In Wolf’s last game at Round Rock on May 17, he went a season-long seven innings, allowed five hits and two runs in earning his first win. Right-handed hitters in the Pacific Coast League were batting just .210 against him. Wolf was selected in the 18th round of the 2002 first-year player draft by the Marlins.
Parker (2-5, 6.04): Parker (6-1, 195 pounds) is scheduled to make his 10th start of the season. After a disastrous beginning to 2013 (0-4, 8.10 ERA in his first five games), the 24-year-old from Fort Wayne, Ind., has righted the ship. Parker is 2-1 with a 4.07 ERA in his last four starts. Opponents hit for a .374 average against Parker in his first five starts. That average is .222 in the last four. In his last outing, Parker limited the Kansas City Royals to four hits and one run in seven innings, but left with a no decision. He has three quality starts in his last four outings. Against the Rangers, Parker is 3-0 with a 2.70 ERA with all the decisions coming last season. The three wins are his most against any team. In day games this year, Parker is 0-1 with a 21.60 ERA. But coming into this season, he was 5-2 with a 2.64 ERA in the sunshine. At Rangers Ballpark, Parker is 1-0 with a 4.50 ERA.