I did a quick google search and was able to find a few pages, but only one reference to Cobb and Jackie together, although it wasn't a specific Cobb quote.
http://www.ajc.com/sports/ron-cobb-a-man-584100.html
“There are undeniable truths about Cobb,” Dr. Cobb said. “He had two failed marriages. He was largely estranged from his [five] children. He physically fought many people, on and off the field. He was, by any way you evaluate it, an absolute racist, although that gets complicated."
Even before they reached the majors, Cobb publicly praised both Jackie Robinson and Hank Aaron. In letters he occasionally referred to the Jewish slugger Hank Greenberg as “my good friend."
“So much about Cobb,” he added, “is couched in myth and I think many stories about him are embellished in a particularly harsh and negative way.”
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some interesting info, unrelated to Robinson specifically...
http://www.baseball-fever.com/showth...torical-Topics
1929 - Negro League infielder Bobby Robinson, claims that while he was a member of the Negro League team, the Detroit Stars, 1929-31, Ty once paid them a visit, and sat next to him on the bench, and talked baseball the whole time. Here's the quote from the book.
"Former semipro and Negro League infielder Bobby Robinson (1916-44) told the author [Nick C. Wilson] that on one occasion he was surprised by a visit from Ty Cobb. He remembered that Cobb came to watch a game played by the Negro League Detroit Stars in the 1920s. Before the game was over Cobb had migrated down in to the Stars' dugout and sat next to Robinson, talking baseball the entire time. Robinson recalled that there wasn't a hint of prejudice in Cobb's attitude that day. They were just two ballplayers sharing stories." (Voices from the Pastime: Oral Histories of Surviving Major Leaguers, Negro Leaguers, Cuban Leaguers and Writers; 1920–1934, Nick C. Wilson, 2000, pp. 113.)
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and another interesting article...
http://bleacherreport.com/articles/4...s-not-a-racist