To find the median weight of the wrestlers, we need to first arrange the weights in order from least to greatest:
112, 130, 142, 150, 178, 206
Since there are six weights, which is an even number, we need to take the average of the two middle values to find the median. The two middle values are 142 and 150, so the median weight is:
(142 + 150) / 2 = 146
Therefore, the median weight of the wrestlers is 146 pounds.