Worth noting

• Nationals first baseman Adam LaRoche is expected to go on a rehab assignment this weekend. It's not known if he will play for Double-A Harrisburg, Class A Hagerstown or Class A Advanced Potomac. LaRoche has been on the disabled list since May 11 because of a right quad strain. Eligible to come off the DL on Sunday, he could rejoin the team the following day against the Marlins.

• Nationals manager Matt Williams is an original member of the D-backs. From 1998-2013, Williams was a player, coach and broadcaster for the organization. So it was natural to seek his reaction to the club's hiring of Tony La Russa as its new chief baseball officer. La Russa will be inducted into the Hall of Fame this summer as a manager.

"Any time you have the ability to add Tony La Russa to your organization, it's a positive step," Williams said. "The knowledge that is there is beyond measure. I think it's a great move for the Diamondbacks. I'm not exactly sure what his duties will be and I don't even know if that's defined as of yet. Hall of Famer -- that resume speaks for itself. Anybody that comes in contact with him will benefit."