Have you been searching for a stock that might be well-positioned to maintain its earnings-beat streak in its upcoming report? It is worth considering Concentra Group (CON) , which belongs to the Zacks Medical Services industry.This provider of occupational health services has seen a nice streak of beating earnings estimates, especially when looking at the previous two reports. The average surprise for the last two quarters was 13.57%.For the most recent quarter, Concentra was expected to post earnings of $ ...