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8/29/2014 6:30 P.M. ET

Rangers extend Hickory agreement

HOUSTON -- The Rangers have reached a four-year agreement with Class A Hickory on their player development contract that will run through 2018. Hickory is the lower of the two full-season Class A teams.

The Rangers now have agreements with Hickory, Triple-A Round Rock and Double-A Frisco through the 2018 season. The agreement with Round Rock remains an interesting situation.

The Round Rock Express is owned by Nolan Ryan, the Rangers former club president who is now a special assistant to the Astros. His son Reid is the Astros president of business operations and his other son Reese runs the Round Rock Express. The Astros have their Triple-A affiliate in Oklahoma City. The Rangers were affiliated with Oklahoma City from 1983 to 2010 before switching to Round Rock.

The Rangers still have to reach an agreement with Class A Myrtle Beach in the advanced Class A Carolina League. That could be a difficult situation.

The Rangers are one of 15 Major League teams whose player-development contract with their advanced Class A team expires at the end of the season. That includes the Braves , who weren't happy about losing Myrtle Beach four years ago, the Cubs, who might want out of Daytona Beach in the Florida State League, and the Reds, who are stuck in Bakersfield in the California League.

Myrtle Beach is one of the more highly desired locations in Class A. The Pelicans are owned by Chuck Greenberg, the former Rangers CEO whose group also just bought the Frisco Roughriders. BB&T Coastal Field in Myrtle Beach is considered one of the top facilities in the Minor Leagues.

Adduci placed on seven-day concussion list

HOUSTON -- The Rangers have placed outfielder Jim Adduci on the seven-day concussion disabled list and recalled infielder/outfielder Ryan Rua from Triple-A Round Rock. Rua, a right-handed hitter, went into the lineup on Friday night, batting fifth and playing first base against Astros left-hander Brett Oberholtzer.

But the Rangers are planning to play him as much as possible, even against right-handed pitching.

"He has come here to play," manager Ron Washington said. "We're going to look at him and see what he has to offer. His bat is the big appeal."

Rua has played all four infield positions and left field in his Minor League career since being drafted in the 18th round of the 2011 First-Year Player Draft out of Lake Erie (Oh.) College. Washington said he'll most likely play first and left field although second base is his best position.

"I'm pretty comfortable at all of them," Rua said. "Whatever they want me to do. This is my life-long dream."

Rua was hitting .306 with 26 doubles, 18 home runs and 74 RBIs in a combined 129 games for Double-A Frisco and Triple-A Round Rock this season. He had a .378 on-base percentage and a .488 slugging percentage.

He is the third player from the 2011 draft to join the Rangers along with pitchers Nick Martinez and Phil Klein.

Adduci hit his head when he tumbled over second baseman Rougned Odor while making a terrific running catch in the fourth inning of Thursday's game. Adduci fell hard on the warning track in foul territory and banged the back of his head. He then slid head-first into the padded wall in front of the stands.

The Rangers reported that Adduci was experiencing "concussion-like" symptoms on Friday and he remained behind at the team hotel. He may resume baseball activities in the next few days.

Holland to make his first start on Tuesday

HOUSTON -- The Rangers announced that Derek Holland will return from the disabled list and make his first start on Tuesday against the Royals. Nick Tepesch will be pushed back to Wednesday and Scott Baker will likely return to the bullpen after his start on Friday against the Astros.

"It has been a long process … longer than expected," Holland said. "If we were in the pennant race, I would have been back sooner, but I can't dictate that. My job now is to compete and show them what I can do. I know the season has been frustrating, it has been frustrating for me too. I just want to be a part of it."

Holland has been out all season after undergoing surgery to repair torn cartilage in his left knee on Jan. 10. He made six starts on medical rehabilitation assignment in the Minor Leagues and was 2-1 with a 4.43 ERA.

"We had to bring Derek off of rehab," manager Ron Washington said. "He is here. He has been deemed healthy. We'll pitch him and see where it goes. Derek can relax. He has been working hard trying to get back here and now he has a date."

Holland has a chance to get 5-6 starts before the season ends depending on how the Rangers set up their rotation through the two remaining off-days. His first start in Arlington will likely be next Sunday against the Mariners.

"I'm not going to lie to you, I couldn't get much sleep last night," Holland said. "Being with the team, it's like being called up again. I'll probably be excited but I know how to calm myself down."

Worth noting

• Outfielder Shin-Soo Choo underwent surgery to have a small bone spur removed from his left elbow. He is expected to begin his rehab program in the next few days and a two-month recovery time is expected.

• Outfielder Jake Smolinski, who has been sidelined with a small fracture in his left foot since July 21, had a boot removed on Thursday and has been cleared to resume baseball activities.

• Washington on the Astros storming away with the Silver Boot: "Just because it got away this year, doesn't mean it can't come back. They outplayed us this year. Those guys are a better team. They are not a doormat anymore."

T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields, and follow him on Twitter @Sullivan_Ranger This story was not subject to the approval of Major League Baseball or its clubs.