had his fourth All-Star season, finishing with a 7–10 record, a 1.94 ERA and 15 saves. On January 14, 1963, Wilhelm was traded by the Orioles with Ron Hansen, Dave Nicholson and Pete Ward to the Chicago White Sox for Luis Aparicio and Al Smith. Early in that season, White Sox manager Al López said that Wilhelm had improved his pitching staff by 40 percent. He said that Wilhelm was "worth more than a 20-game winner, and he works with so little effort that he probably can last as long as Satchel Paige." He registered 21 saves and a 2.64 ERA. In 1964, Wilhelm finished with career highs in both saves (27) and games pitched (73). His ERA decreased to 1.99 that season; it remained less than 2.00 through the 1968 season. In 1965, Wilhelm contributed to another passed balls record when Chicago catcher J. C. Martin allowed 33 of them in one season. That total set a modern single-season baseball record for the category. Wilhelm's career-low ERA (1.31) came in 1967, when he earned an 8–3 record for the White Sox with 12 saves. In the 1968 season, Wilhelm was getting close to breaking the all-time games pitched record belonging to Cy Young (906 games). Chicago manager Eddie Stanky began to think about using Wilhelm as a starting pitcher for game number 907. However, the White Sox fired Stanky before the record came up. Wilhelm later broke the record as a relief pitcher. He also set MLB records for consecutive errorless games by a pitcher, career victories in relief, games finished and innings pitched in relief. Despite Wilhelm's success, the White Sox, who had won at least 83 games per season in the 1960s, performed poorly. They finished 1968 with a 67–95 record. Wilhelm was noted during this period for his mentoring of relief pitcher Wilbur Wood, who came to the 1967 White Sox in a trade. Wood sometimes threw a knuckleball upon his arrival in Chicago, but Wilhelm encouraged him to throw it full-time. By 1968, Wood won 13 games, saved 16 games and earned a 1.87 ERA. He credited Wilhelm with helping him to master the knuckleball, as the White Sox coaches did not know much about how to throw it. Between 1968 and 1970, Wood pitched in more games (241) than any other pitcher and more innings――than any other relief pitcher. After the 1968 season, MLB