• The Cubs have released right-hander Blake Parker, according to the MLB.com transactions page. Parker, designated for assignment yesterday, had not appeared in the big leagues this year. In his 3 1/3 innings at the Triple-A level, Parker permitted one earned run to score while striking out one and walking three batters. He does own a 3.68 career ERA in the majors, with a healthy 10.4 K/9 against just 2.9 BB/9.
• Righty Daniel Cabrera has been released by the Reds, the club’s Triple-A affiliate tweets. The 33-year-old has not appeared in the big leagues since 2009, and spent each of the last two seasons playing in Japan. He made just one appearance at Louisville this season, going three innings and allowing one earned run but issuing four free passes and striking out only one opposing batter.
• The Dodgers have signed right-hander P.J. Walters, who had been pitching with the independent Atlantic League’s Lancaster Barnstormers, reports Mike Ashmore of the Trentonian (Twitter link). The 30-year-old Walters should join L.A.’s Minor League ranks following the move. Though Walters has posted just a 6.28 ERA in parts of five Major League seasons with the Cardinals, Twins and Blue Jays, he does have a lifetime 4.70 ERA with 8.0 K/9 and 3.6 BB/9 in Triple-A.
• Former Twins left-hander Pedro Hernandez has signed a contract with the independent St. Paul Saints, the team announced. Hernandez was acquired along with Eduardo Escobar in the 2012 trade that sent Francisco Liriano to the White Sox. The now-26-year-old Hernandez struggled to a 7.33 ERA with 33 strikeouts against 26 walks in 66 1/3 Major League innings with the Sox, Twins and Rockies from 2012-14. He posted solid, if unspectacular numbers throughout much of his Minor League career until reaching the Triple-A level.
• Right-hander Robert Stock’s contract has been purchased by the Pirates, according to a tweet from the Normal CornBelters of the independent Frontier League. The 25-year-old hit the indy circuit after posting a 4.12 ERA with 43 strikeouts against 46 walks in 63 1/3 innings between the Cardinals’ Class-A and Class-A Advanced affiliates in 2014.

• Jesus Guzman elected free agency rather than accept a Triple-A assignment from the Astros, Union Radio’s Pascual Artiles reports (Twitter link).  Houston outrighted Guzman off its 40-man roster earlier this month.  Guzman was acquired from the Padres last December and hit .188/.272/.248 in 184 plate appearances in 2014.
• Second baseman Tony Abreu has elected to become a free agent, leaving the Giants organization.  Abreu has been with the Giants for the last two seasons, appearing in three games with the team in 2014 and 53 in 2013.  Abreu has 615 PA to his name since debuting in the majors in 2007, posting a career .254/.283/.373 line for the Giants, Royals, Diamondbacks and Dodgers.
• Second baseman Cord Phelps has elected free agency.  Phelps played for the Orioles in 2014, appearing in three Major League games and hitting .259/.361/.388 over 403 PA at Triple-A Norfolk.
• The Dodgers re-signed left-hander Robert Carson.  The southpaw posted a 5.74 ERA over 62 2/3 IP in the minors with the Angels and Dodgers in 2014, getting released by L.A.’s red team in May and signing with L.A.’s blue team a week later.  Carson threw 33 innings for the Mets in 2012-13, posting a 6.82 ERA in his brief time in the Show.
• Left-hander Pedro Hernandez has elected to become a free agent, leaving the Rockies.  Hernandez posted a 6.42 ERA in 88 1/3 IP for Triple-A Colorado Springs in 2014, and made one start for the Rockies in July.  The southpaw has a career 7.33 ERA over 66 1/3 IP with the Rockies, Twins and White Sox since 2012.
• The Rockies released and then re-signed right-hander Simon Castro, according to the club’s official transactions page.  He first signed with Colorado in April but didn’t pitch at all in 2014 due to injury.  Castro was ranked as the game’s 58th-best prospect by Baseball America prior to the 2011 season while in the Padres farm system, and was dealt to the White Sox as part of the Carlos Quentin trade package in the 2011-12 offseason.  His Major League experience consists of 6 2/3 IP with Chicago in 2013.
• Left-hander Cesar Cabral, most recently of the Yankees organization, has elected to become a free agent, Examiner.com’s Dan Pfeiffer reports (Twitter link).  Cabral appeared in four games for the Yankees in 2014, totaling one inning pitched and allowing three earned runs.  His Major League resume also includes 3 2/3 IP for New York in 2013.  The southpaw has a 4.01 ERA, 2.58 K/BB rate and 420 strikeouts over 422 1/3 career minor league innings.

• The Rockies have outrighted Pedro Hernandez to Triple-A, according to the MLB transactions page. The 25-year-old lefty made one start for Colorado before he was designated. As he has previously been outrighted, Hernandez will have the right to elect free agency.
• Reliever Jose De Paula has re-signed with the Giants on a minor league deal, per the MLB transactions page. The club had designated and then released him just days ago.
• The Nationals have released righty Josh Roenicke, according to the International League transactions page. Roenicke had spent at least some time in the big leagues for each of the prior six seasons, and logged 150 2/3 between 2012-13. But moving to the starting rotation for the first time as a professional has not resulted in high-level production at Triple-A this year; Roenicke has struggled to a 5.45 ERA through 79 1/3 frames (15 starts) with 4.2 K/9 against 3.5 BB/9.
• Ryan Feierabend of the Rangers has accepted an outright assignment rather than electing free agency, tweets Evan Grant of the Dallas Morning News. The left-hander made his way back to the bigs for the first time since 2008 with a Texas club that has cycled through more than its fair share of arms this year.
• The Royals outrighted Brett Hayes to Triple-A after the catcher cleared waivers, USA Today’s Bob Nightengale reports (Twitter link).  As the backup behind workhorse starter Salvador Perez, Hayes hasn’t seen much action this year, appearing in 27 games and posting a .362 OPS over only 53 PA.
• The Diamondbacks signed right-hander Graham Godfrey, Baseball America’s Matt Eddy reports.  Godfrey posted a 5.09 ERA and 23 strikeouts in 46 innings with the A’s in 2011-12 and he spent last season pitching for the Red Sox and Pirates’ Triple-A affiliates.
• The Diamondbacks released first baseman Wagner Mateo earlier this week, according to the Pioneer League’s transactions page.  Mateo originally signed a contract as a 16-year-old with the Cardinals worth a $3.1MM bonus in 2009 but St. Louis voided that deal after Mateo’s physical revealed apparent vision problems.  Mateo signed a $512K contract with the D’Backs a year later and hit .230/.312/.349 over 802 pro plate appearances, never getting above the High-A ball level.  He also posted an 8.87 ERA over 22 1/3 relief innings over the last two seasons.
• The Reds released right-hander Adam Russell last week, as announced via Twitter by their Triple-A Louisville affiliate.  Russell posted a 3.95 ERA, 7.0 K/9 and 1.46 K/BB rate over 86 2/3 relief innings with the White Sox, Padres and Rays from 2008-11, and he’s since toiled in the minors with four other organizations.  He had a 4.33 ERA, 8.7 K/9 and 1.79 K/BB in 35 1/3 IP this season with Louisville.
• Zach McAllister and Evan Scribner were both respectively optioned to Triple-A by the Indians and Athletics over the weekend.  The two righties were both on optional assignment waivers after being designated off their team’s 25-man rosters (but not the 40-man rosters) on Friday, though they were procedural moves rather than traditional DFAs, and neither player was in any danger of being claimed by another club.
• To monitor players who have been properly designated for assignment, check out MLBTR’s DFA Tracker, as a whopping 10 players currently reside in “DFA limbo.”

Hernandez spent most of the year pitching at Triple-A, working 85 innings and compiling a 6.14 ERA. Last year, with the Twins, he tossed 56 2/3 frames of 6.83 ERA ball.