Halfway through his first full season, 1906, Cobb came down with what his manager, Bill Armour, called a "stomach illness," causing him to miss several weeks while resting in Detroit. He may have undergone surgery to remove an ulcer during this time, but there has never been conclusive evidence one way or the other. The emotional strain from the Tigers had done him in, in only his second season. When he returned, relations with McIntyre did not improve. During the first game of a doubleheader in St. Louis on October 6, he and McIntyre argued over who should catch a fly ball, while the ball landed between them and the batter, George Stone, circled the bases for an inside-the-park home run, with Cobb and McIntyre arguing the entire time. The pitcher, Ed Siever, bawled Cobb out in the clubhouse, and later attacked Cobb in the hotel lobby. Cobb floored Siever with a right and pounded on him while he lay on the ground. Cobb supposedly stayed awake all night in his Pullman berth with his gun on his lap during that night's train ride to Chicago.