Another comp is Matt Diaz, who is actually very similar to Jacobs. Diaz had some not terrible k/bb ratios (2/1) in the low minors, but those ballooned to about 4/1 in AA and AAA and have stayed pretty bad in the majors. If Katin could improve to those rates, he might have a shot. He doesn't hit for Diaz's average, but has better power and--per BA--is supposed to have a very good outfield arm