How close are standout Dodgers prospects River Ryan, James Tibbs III to call-ups?

Source: New York Post

Patience, they say, is a virtue. Especially if you’re a prospect in the Dodgers’ organization. On a team that has won back-to-back World Series with a veteran MLB roster, and continues to boast one of the most highly-touted farm systems in the entire sport, big-league roster spots can be scarce, and MLB opportunities hard to come by.