Today's minor transactions from around baseball:
Reds re-sign Zach Duke
A source has confirmed to MLB Daily Dish that Duke's new deal with the team includes an opt-out clause at the end of the Triple-A season on September 2nd.
After signing with Cincinnati following his release from the Nationals in June, the southpaw posted 0.98 ERA in 18.1 innings of work with Louisville, and opted out last week in search of a major league opportunity.
Once he was unable to find one, he decided to return to Louisville for the rest of the month, and will try to crack a major league team once rosters expand in September. In 12 games with the Nationals this season, the 30-year old posted a 8.71 ERA, 4.8 K/9, and 3.5 BB/9 in 20.2 innings. In nine major league seasons with the Pirates (2005-2010), Diamondbacks (2011) and Nationals (2012-2013), Duke has posted a 50-75 record and 4.60 ERA, and was named to the National League All-Star team in 2009.
White Sox release Tyler Greene
Greene was released by the Astros during spring traning and signed with Chicago at the beginning of April before posting a .222 average with 1 HR and 3 RBI in 22 major league games to start the year. He was outrighted to Charlotte in June, and has hit .240 with 3 HR and 27 RBI in 56 games in the minors.
Giants outright Guillermo Quiroz to AAA Fresno
The 31-year old was designated for assignment last week after posting a .186 average with 1 HR and 6 RBI in 43 games at the major league level this season.
Southern Maryland Blue Crabs sign Tim Redding
Former major league starter Tim Redding has signed with the Southern Maryland Blue Crabs of the Atlantic League, according to the league's transactions page.
Redding, who last appeared in the majors in 2009 with the Mets, spent part of the 2012 season with the Blue Jays' Triple-A affiliate. In eight major league seasons with the Astros (2001-2004), Padres (2005), Yankees (2005), Nationals (2007-2008) and Mets (2009), the 35-year old went 37-57 with a 4.95 ERA in 179 appearances.
Sugar Land Skeeters sign Clay Hensley
The 33-year old has been released from both the Reds and Brewers Triple-A affiliates this season, and has posted an 0-1 record and 3.92 ERA in 19 Triple-A appearances on the year.
Tigers claim Ronny Paulino from Orioles
The Detroit Tigers were awarded catcher Ronny Paulino after claiming him off waivers from the Baltimore Orioles, according to an announcement from the Orioles' Triple-A affiliate. After signing with the O's in May, the 32-year old hit .234 with 1 HR and 4 RBI in 16 games at Double-A and Triple-A, and will be assigned to Triple-A Toledo.
Rays sign Joe Van Meter
The 2010 21st round pick was released by the Rangers after struggling to an 0-4 record and 7.56 ERA with Double-A Frisco, but his previous minor league statistics indicate that the 24-year old still has promise.
Twins acquire Miguel Sulbaran from Dodgers
Sulbaran, 19, has pitched to a 6-4 record and 3.01 ERA in 23 games with Single-A Great Lakes, and is considered to be a high-ceiling prospect. MLB.com's Jonathan Mayo ranked Sulbaran as the Dodgers' fourteenth best prospect before the deal, meaning that the young Venezuelan native is a surprisingly high return for the offensively-challenged Butera.