If we are looking at these pitchers as starters, bear in mind:
Velasquez started two games this year, against Tampa and Balitmore.
Johnson started two games this year against Miami and the Angels
Wright started 4 games this year against Baltimore, Detroit and two against Seattle.
Wright had one great game against Seattle and one he got pasted. The rest of these teams are all below .500 (except Tampa, who went one game over yesterday for the first time all season) and are not very likely to be post-season competition for Boston.
Their starts for the most part appear to be picked to be against the weaker teams. While any pitcher can have a great post-season game at any time, I really would lack the confidence of these pitchers starting. I'd rather see Price out there...