Brandon Webb has solid session
"Wow," Washington said. "The ball was coming out of his hand really good. The arm strength is picking up."
Washington said Webb threw 60 to 65 pitches off flat ground during a 17-minute session Thursday.
The Rangers decided they wanted the right-hander to build up arm strength before getting back on a mound after his short bullpen session during the first workout a week ago.
The former NL Cy Young Award winner hasn't pitched in a major league game since the 2009 opener for Arizona because of shoulder surgery.
Washington said Webb could throw off a mound Sunday or Monday "if everything keeps progressing."
Webb is set to throw again Friday.
Information from The Associated Press was used in this report.