Mathis said in a statement released through his official
Twitter account that his failed test was a result of fertility
drugs which his doctor said would not violate the NFL's policy
on performance-enhancing substances.
"I made the mistake of not calling the NFL or NFLPA to double
check before I took the medication at the end of last season,"
said the 33-year-old, whose wife had twins in 2012 and is
expecting another baby this year.
"The union has worked very closely with me to present all of the
facts and medical records for consideration of discipline that
does not include a suspension because of the unique facts of my
case, but the Commissioner refused the request."
The six-time Pro Bowl selection will be eligible to return to
the Colts' active roster on Sept. 29 after the team's Week 4
game against the Tennessee Titans.
In a statement, the Colts said: "We recognize the extreme
seriousness of this matter and will honor the confidentiality
requirements of the league's program.
"We nevertheless wish to assure Robert and our fans that he
remains an honored and cherished member of the Colts family and
that we support him as he deals with this difficult challenge."
Mathis, one of the most respected leaders for the Colts, led the
league with a franchise record 19.5 sacks last season.
(Reporting by Mark Lamport-Stokes in Los Angeles; Editing by
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