Former NFL player Sergio Brown has been paid several visits while being held in Cook County Jail as he awaits trial on charges of first-degree murder and concealing a body in the death of his mother, Myrtle Brown. A visitor log obtained by RadarOnline.com on Thursday showed that he has been visited 18 times by nine different people since being booked on Oct. 25. The first visit was listed on Oct. 31, and the latest visit was on Jan. 2, with some in November and just after Christmas. On the log is a Dec. 28 visit from a “Nicholas Brown” but it is unclear if that is Sergio’s brother, Nick Brown,…