Little progress toward new CBA in latest bargaining session between MLB and MLBPA, sources say

A bargaining session between Major League Baseball and the players' union lasted just 15 minutes Thursday and produced little progress toward a new collective bargaining agreement, sources familiar with the situation told ESPN.

The union offered tweaks to its arbitration demands while asking MLB for more money in a pre-arbitration bonus pool, according to sources.

A three-man MLB delegation led by deputy commissioner Dan Halem arrived shortly before 1 p.m ET for just the sixth negotiating session on core economics since the work stoppage began in December. The sides met on the 78th day of the lockout and one day after spring training workouts were scheduled to commence, but sources told ESPN…