The Texas Rangers have announced a news conference for 1 p.m. CT Thursday to announce an eight-year contract extension for SS Elvis Andrus that could keep him in Texas as long as 10 seasons after 2013, but most realistically only guarantees his service to the club through 2018. Andrus, 24, is under contract through 2014. The eight-year extension, worth $15 million per year, kicks in after that. The deal includes a vesting option for 2023, but also an “escape clause” that would allow Andrus to test free agency after 2018 when he is 30. If Andrus were to stay in Texas for the full length of the contract, plus the option year, the Rangers commitment to him would be just more than $146 million. Andrus, who went 4-for-13 in the Rangers’ opening series win over Houston, acknowledged on Tuesday that “he was going to be here a little while,” and expressed excitement over the deal, though he did not disclose any details.