More on the investigation

Major League Baseball has asked the U.S. Anti-Doping Agency to help its investigation into whether several players named in an Al Jazeera documentary received banned drugs.

The two groups have shared information before but have never cooperated to such a formal extent.

"We've had discussions with USADA and are hopeful that together we can make progress in this investigation," said Dan Halem, MLB's chief legal officer, who oversees baseball's drug program.

Ryan Howard has sued after being named in an Al Jazeera documentary about doping.Halem was expected to meet with USADA CEO Travis Tygart Tuesday at MLB's Manhattan headquarters.

Tygart declined to confirm the partnership or the meeting, but he…