Jim Seals, who as part of the duo Seals and Crofts crafted memorably wistful 1970s hits like “Summer Breeze” and “Diamond Girl,” died Monday at age 80. No cause of death was immediately given. Several friends and relatives confirmed the death. “I just learned that James ‘Jimmy’ Seals has passed,” announced his cousin, Brady Seals, a former member of the country band Little Texas, Monday night. “My heart just breaks for his wife Ruby and their children. Please keep them in your prayers. What an incredible legacy he leaves behind.” Wrote John Ford Coley, “This is a hard one on...