Signed as an amateur free agent in 1963, Jim Lonborg was pitching for the Boston Red Sox less than two years later, as the Stanford University graduate left spring training in 1965 as part of the team’s starting rotation. A fast start out of the gate that included two wins against New York had him at 4-2 with a 2.48 ERA at the end of May, but the young right hander would struggle the rest of the way along with a club that finished with 100 losses; at the end of his rookie campaign, the 23-year-old had posted a record of 9-17 with a 4.47 ERA in 31 starts. Fortunately for Lonborg, as the season came to a close, so did the end of an era as the insufferable general manager Pinky Higgins was replaced by relative visionary Dick O’Connell; whereas the potential of a player like Lonborg might have been shipped elsewhere for an overpriced veteran by Higgins, O’Connell preached patience and persistence in developing raw talent that might someday bring a franchise back to prominence. Although 1966 would not be much of an improvement over the previous season for the club, under the tutelage of pitching coach Sal Maglie, Lonborg bettered himself as a future big-league pitcher while going 10-10 in 23 starts.
When 1967 rolled around, Lonborg had two years of experience under his belt, ready to take the ball as Boston’s Opening Day starter; the day would end with a 5-4 victory for the Red Sox over the White Sox at Fenway Park and Lonborg’s first of 22 wins that season. Five straight wins between 14 May and 02 June had him at 7-1 with a 2.85 ERA and made him an easy selection for his first and only All-Star appearance. He averaged better than eight strikeouts per nine innings over the course of the season, striking out a season-high 13 in a complete-game shutout against Kansas City in late April, and struck out ten or more eight times to finish with a league-best 246 strikeouts. The imposing 6-foot-5 pitcher also led the league in hit batsmen with 19 as Maglie had taught him to pitch inside to keep hitters honest, a historic advantage to pitchers at Fenway. On the last day of the season, with Boston needing a win to at least force a tie for first place, Lonborg made his last start perhaps his most memorable; he went the distance and allowed just three runs on seven hits, four walks, and five strikeouts as the Red Sox won 5-3 over Minnesota and the delirious Fenway faithful celebrated by storming the field and lifting him into the air. For his efforts that season, Lonborg easily walked away with the first American League Cy Young Award (the honor had previously been bestowed since its inception in 1956 to a single major league pitcher) as well as enough votes to finish sixth for Most Valuable Player honors.
Unfortunately, the aura that surrounded the success of that season quickly faded for the young right hander; just over two months after the conclusion of the 1967 World Series, as he enjoy a day on the slopes at a Lake Tahoe ski resort, Lonborg tore ligaments in his right knee as he made his final run of the day. Though neither he or the Red Sox showed much initial concern, the extent of the injury was enough to keep him out for almost the first two months of the season before he returned to action as a starter in mid-June of 1968. The effects of the accident were immediately apparent; on the heels of a break-out season, Lonborg would win just six games in 17 starts as Boston failed to defend the pennant. Over the next few seasons, Lonborg would continue to struggle to reclaim the magic of that dream season; he missed time at the start of 1969 and, despite a 6-0 start, won only one more that season and finished at 7-11. Then, after a promising start in 1970, he would last through just the first quarter of the campaign before being shipped to Triple-A Louisville with arm troubles, making just two more appearances in relief for the rest of the season. Finally, after more troubles limited him to 26 starts in 1971, despite 10 wins to his credit, the Red Sox made the decision to part ways with the seemingly ineffective Lonborg and traded him to Milwaukee in a huge ten-player trade.
However, to the disbelief of many, Lonborg stuck around for another seven-plus seasons in the majors and won an additional 107 games. With the Brewers in 1972, he made 30 starts and won 14 games with a career-low 2.83 ERA. The following season, having been traded to Philadelphia, he won another 13 games, then made an impressive 39 starts in 1974 and won 17 games. Two years later, he surprised baseball yet again with another 18 games in 32 starts and collected 11 more wins in 1977 but, within two years, he was done, making just one start in four appearances in 1979 before he put his glove away for good and finishing with 175 wins and a 3.86 ERA over a 15-year career. Today, after attending and graduating from Tufts University Dental School in Boston, Lonborg practices dentistry, not too far from where he pitched for seven seasons with the Red Sox.