C.P. Jackson in his most recent book featured the ""Large Fry League, "" O.B., the ""Mighty Mite League."" Teamed up, they've gone back to the big time with their story of Zeke Pender, who is heavily groomed by the major league's Atlanta Braves in their farm club as a possible reinforcement for their aging catching staff. Pender was nick-named. Zeke for his country boy ingenuousness, and he's eager to pick up every crumb of baseball information that comes his way. The reader is apparently expected to gape right along with Zeke, for the text consists almost entirely of tips about ball play and catching. As for story--well, Zeke's major problems are his own lack of lip when it comes to telling off teammates and too much from his main competitor.