Possible Clues:

• Sprint rival
• Trying person, for short
• Member of the bar: Abbr
• Bar passer: Abbr
• Ma Bell, once
• J.D. holder: Abbr.
• QB's stat: Abbr
• A.B.A. member: Abbr.
• __.com (phone service site)
• Part of a long-distance company's 800 number