Texas Rangers pitcher Matt Harrison will start Tuesday against the Arizona Diamondbacks after recovering from a back injury, according to MLB.com.

Texas Rangers pitcher Matt Harrison will start Tuesday against the Arizona Diamondbacks after recovering from a back injury, according to MLB.com. Harrison refused to agree to an extended rehab assignment, likely speeding up his timetable for activation.

Harrison (back) is expected to start Tuesday or Wednesday, Evan Grant of the Dallas Morning News reports.

Harrison will make one last rehab appearances at Double-A Frisco this week before rejoining the Rangers. His activation should come early next week, but the Rangers are yet to decide whether he'll take the hill Tuesday or Wednesday against the Diamondbacks.

Harrison (back) will make one final rehab appearance this week before rejoining the Rangers, the Fort Worth Star-Telegram reports.

Harrison has informed Texas that he will not agree to an extended rehab assignment, which will require Texas to activate him by the end of the week. His eventual role has not been determined.

Texas Rangers pitcher Matt Harrison will make one more rehab appearance this week before returning from his back injury, according to the Fort Worth Star-Telegram.

Texas Rangers pitcher Matt Harrison will make one more rehab appearance this week before returning from his back injury, according to the Fort Worth Star-Telegram. Harrison did not agree to an extended rehab assignment, which means he must be activated before the end of the week.

Harrison (back) is expected to throw a bullpen session in Toronto this weekend before making another rehab start, Jeff Wilson of the Fort Worth Star-Telegram reports.

The plan is said to be tentative, but Harrison struggled again in a rehab outing with Double-A Frisco on Wednesday (five earned runs in six innings) and it sounds like the Rangers want to see more before entrusting him with a major league rotation spot. Harrison, who underwent spinal fusion surgery last summer, has made just four starts in the majors since 2012.

Harrison (back) will make his next rehab start Wednesday at Double-A Frisco.

Harrison didn't fare well in his last rehab start, allowing eight runs (six earned) on nine hits over six innings. In fact, it was the second time in four rehab starts that he's surrendered more than six earned runs. Despite an earlier report that he would move up to Triple-A Round Rock, it looks like the Rangers will keep him down in Double-A for his next outing. He is still likely several rehab appearances away from rejoining the Major League club.

Texas Rangers pitcher Matt Harrison will make his next rehab start for Double-A Frisco on Wednesday as he recovers from a back injury, according to the team's official website.

Texas Rangers pitcher Matt Harrison will make his next rehab start for Double-A Frisco on Wednesday as he recovers from a back injury, according to the team's official website. Harrison struggled in his last rehab outing, allowing eight runs on nine hits over six innings.

Harrison (back) will make his next rehab start Friday at Triple-A Round Rock, Jeff Wilson of the Fort Worth Star Telegram reports.

The plan is for Harrison to make a few more rehab starts before returning to the Rangers, but he seems to be recovering well considering he threw 98 pitches in his last appearance without issue.

Texas Rangers pitcher Matt Harrison will make his next rehab start Friday for Triple-A Round Rock while recovering from a shoulder injury, according to the Fort Worth Star-Telegram.

Texas Rangers pitcher Matt Harrison will make his next rehab start Friday for Triple-A Round Rock while recovering from a shoulder injury, according to the Fort Worth Star-Telegram. Harrison is expected to make a few more rehab starts before returning to the big club.

Harrison (back) will likely be asked to make a few more rehab appearances, the Fort Worth Star-Telegram reports.

Texas starters have reeled off a club-record 11-straight quality starts, which no doubt is playing some role in a seemingly cautious approach in bringing Harrison back. Harrison threw 98 pitches in his most recent rehab start, so conditioning shouldn't be an issue.

Harrison gave up two runs over 6.2 innings in Sunday's rehab start for Triple-A Round Rock, striking out four batters on 98 pitches, Jeff Wilson of the Fort Worth Star-Telegram reports.

Given the pitch count and innings total, Harrison is seemingly ready to join the Rangers' starting rotation. With the team's current group of starters performing surprisingly well, it remains to be seen when that will actually happen.

Harrison (back) is slated for 100 pitches in his rehab start Sunday, Fox Sports Southwest's Anthony Andro reports.

Given the anticipated workload Sunday, Harrison could rejoin the Rangers' rotation at any point following that outing. Wandy Rodriguez and Chi Chi Gonzalez would be the options for him to unseat, but that may not happen anytime soon. For now, just continue to monitor Harrison's health and his effectiveness in these rehab outings.

Harrison allowed eight hits, two walks and six runs over 5 innings in a rehab start at Triple-A Round Rock on Monday.

Harrison faded down the stretch, with four of his last five hitters reaching base, but he was able to increase his workload up to 86 pitches. The effectiveness of the Texas rotation affords them the opportunity to be patient with Harrison here as he returns to form.

Harrison (back) threw 78 pitches over five innings in a rehab start with Triple-A Round Rock on Wednesday, Stefan Stevenson of the Fort Worth Star-Telegram reports. He gave up two earned runs on five hits and posted a 4:1 K:BB ratio in the game.

Harrison has advanced to game action after throwing several times at the Rangers' extended spring training complex. With him already extending his pitch count to around 80 pitches, he could rejoin the big club at some point in the next few weeks.

Harrison (back) will make a rehab start Wednesday at Triple-A Round Rock, Anthony Andro of FOXSportsSouthwest.com reports.

Harrison is expected to cover around 85 pitches in the start, after previously tossing 77 pitches in an extended spring-training game during the past week. The left-hander hasn't pitched in an MLB game since April 2013 after undergoing back surgeries each of the past two seasons, providing an uphill battle for him in his quest to reestablish himself as a useful rotation member for the Rangers. He'll likely require several rehab starts before the team activates him from the DL.

Harrison (back) threw 77 pitches in an extended spring training game Thursday, Evan Grant of the Dallas Morning News reports.

The plan is for Holland to throw a bullpen session in front of team brass Sunday, after which he may be cleared to start a rehab assignment next week. If everything goes well, he'll be in the big-league starting rotation at some point in June.

Harrison (back) will make another start at extended spring training Thursday, Jeff Wilson of the Fort Worth Star-Telegram reports.

Harrison is expected to cover five innings in the outing and then head to Arlington to throw a bullpen session for the team brass. It's possible that if management is satisfied with his performance during the session, Harrison could begin a rehab assignment at a minor-league affiliate as soon as next week.

Texas Rangers pitcher Matt Harrison will make another start in extended spring training Thursday while recovering from a back injury, according to the Fort Worth Star-Telegram.

Texas Rangers pitcher Matt Harrison will make another start in extended spring training Thursday while recovering from a back injury, according to the Fort Worth Star-Telegram. Harrison could begin a rehab assignment next week.

Harrison (back) is expected to throw one more extended spring training game Saturday, at which point he could head to Double-A Frisco on a rehab assignment, Jeff Wilson of the Fort Worth Star-Telegram reports.

Harrison has been sidelined since early last season after undergoing spinal fusion surgery last June. He finally appears to be making some progress towards a return to the mound. If all goes well in his extended spring training start, he could move on to beginning a rehab assignment before an eventually rejoining the Rangers.

Harrison (back) will pitch another extended spring training game Monday, Jeff Wilson of the Fort Worth Star-Telegram reports.

Harrison threw a spring training game Wednesday, allowing two runs over two innings. He'll be evaluated again after Monday's session, and at this point he appears to be on course to begin a rehab assignment near the end of the month.