Plenty of players are not taken in the rule 5 draft every year. That doesnt mean they arent good, it just means that a team didnt want to add him to their 40 man roster and carry him on the 25 man roster for a full season. Guys who basically are a LH LF/1b platoon guys probably arent very popular. Heck Rule 5 picks dont even happen that much as it is.