Lobert married Rachael Campbell in 1913. That same year he won the 100 yard dash on the Polo Grounds against Jim Thorpe. He had the top fielding percentage as a third baseman in the National League with a .974 fielding percentage and came in third in the National League with 98 runs, 41 stolen bases, and 243 bases, while playing all but one game. At this point, he considered signing with the Chicago Whales as part of the Federal League. John McGraw, manager of the New York Giants, convinced him to not join, and in January 1914, Lobert signed a three-year contract with the Giants that matched the same salary the Whales had offered. In addition to this, the Giants also traded pitcher Al Demaree, third baseman Milt Stock, and reserve catcher Bert Adams for Lobert. He only ended up being a regular third baseman batting .251. In 1915, his season ended after 106 games due to torn ligaments in his knee. He played his last game with the Giants on October 3, 1917 at the age of 35.