Obama has time to decide, but the Chicago Tribune reported that a letter from Jerry Reinsdorf dated Jan. 21, the day after the inauguration, asked the team's No. 1 fan to test his left arm before the White Sox play the Royals.
It wouldn't be the first time the president has taken the mound on the South Side. He threw out the first pitch during the 2005 playoffs.
Sales of Sox caps have been on the rise since Obama was spotted on several occasions donning one of his own. In an effort to capitalize on that trend, the team has recently announced the creation of a Sox "Obama" cap. Proceeds from sales of that hat are marked for charity, but the team is awaiting a nod from the White House before the cap is marketed.